Malicious PDF — malware analysis report

Static analysis result for SHA-256 10fde72bd2182b69…

MALICIOUS

PDF

64.5 KB Created: 2020-08-18 22:57:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: aa91f9123c9faa268cfaafa6ccdd9a61 SHA-1: 440b147f44e28e10cb19bd95ab078b198ffb97d5 SHA-256: 10fde72bd2182b6969a11c099f56ed430fb2387874cfbcfb818acd73f3f961ba
194 Risk Score

Malware Insights

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

The PDF file contains numerous links, many of which point to a redirector infrastructure identified as malicious. The document body, though heavily obfuscated, contains a URL that is also present in the heuristics, indicating a likely phishing or scam attempt. The ML classifier strongly suggests maliciousness, and the presence of redirector links points towards an attempt to lead the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • 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=metric+unit+conversion+capacity+worksheet In PDF document text
    • http://files.mandarinworld.net/uploads/1/3/1/8/131856574/4699230.pdfIn PDF document text
    • http://files.andersonpsychassoc.com/uploads/1/3/2/6/132681322/noguforut_vujoturerug_gazovajaz.pdfIn PDF document text
    • http://vukizuzu.menengagedelhi.net/uploads/1/3/0/7/130775573/bc1f523a0fdc.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6332/0471/files/12269072054.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5122/0120/files/bijobekifa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/kozaw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5530/7159/files/lasixerizomofo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9415/5169/files/tolkien_beowulf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6553/0785/files/dnd_5e_oathbreaker.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/5189/0341/files/danevaloxixel.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8244/1113/files/kozatixes.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2868/3672/files/18521395010.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

Related samples 8

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_off0000b31f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB31F 2828 bytes
SHA-256: 3b89a1333aa93e194de12c5c5da229a8f3a969ace6b07a90c5323b9ece6747ec
font_01_sfnt_off0000bd1a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBD1A 5312 bytes
SHA-256: 3dad08ce30be9eb3af4224c0fbec4cbf7290f29a841216c99d03a0c7f7eaa82e
font_02_sfnt_off0000cf54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF54 10528 bytes
SHA-256: ce2a70b43c3a531a5db5d9cc9ed24361643182227a473cae61edd63a5e8bca22

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