Malicious PDF — malware analysis report

Static analysis result for SHA-256 7939d5fd716e8c44…

MALICIOUS

PDF

40.9 KB Created: 2020-08-02 23:50:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 7f944410f6c702d350b411b9db2b64bf SHA-1: a72fa9b235139ca31f5195d2672496af2bc3fee9 SHA-256: 7939d5fd716e8c44517af1fc0832eae52413391c1e1e55c740445a4741a526e2
234 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous links disguised as a manual, directing users to SEO redirectors and link farms, indicating a phishing or malware distribution attempt. The presence of a malicious redirector URL and ML classification strongly suggests malicious intent. Although no scripts were directly extracted, the PDF structure and embedded links are indicative of a spearphishing attachment designed to lead users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND
    Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.com/pify?keyword=toshiba+dkt2020-+sd+manual In PDF document text
    • http://files.lostcityoftrellech.org/uploads/1/3/1/6/131606349/4494339.pdfIn PDF document text
    • http://files.miss-millers-classroom.com/uploads/1/3/1/6/131606393/e06b5587d.pdfIn PDF document text
    • http://files.cookiesbykristin.com/uploads/1/3/0/9/130969477/nesubigifatajosid.pdfIn PDF document text
    • http://files.candicechristie.co.za/uploads/1/3/0/7/130775347/4740321.pdfIn PDF document text
    • http://files.jeffersonumcmd.org/uploads/1/3/1/3/131381919/gisuja.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2785/6536/files/22246429167.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2385/8850/files/lil_bomber_gungeon.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4853/3142/files/54456497738.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/68876684382.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4361/7948/files/example_of_negative_punishment.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6323/8056/files/wuludikuzira.pdfIn macro / runtime command snippet
    • https://cdn.shopify.com/s/files/1/0436/1335/6189/files/wipoxijixiwimabuxasinena.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4555/2277/files/45605830219.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/20785775646.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4115/3439/files/99725704227.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/5198/0712/files/89502451185.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9582/6336/files/wavuf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/botezosural.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
🗂 Part of campaign: candicechristie.co.za 4 samples

Related samples 3

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000552a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x552A 5192 bytes
SHA-256: be2ba2e7e7744d04ec614e26ecdab960f63d9fe49f0d856caef05fb3e1e812ea
font_01_sfnt_off000066a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x66A6 9948 bytes
SHA-256: 405477d1dc962e7c43c1e295da3d8efa8f998ab8d8da36aedbab0075613fb8f7
font_02_sfnt_off000088ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x88AC 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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