Malicious PDF — malware analysis report

Static analysis result for SHA-256 83c24f4c54c9a59f…

MALICIOUS

PDF

39.9 KB Created: 2020-08-07 06:28:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 198b7743103f15773084d2095c317811 SHA-1: 2b6473bc1dcfab48fb78e9bbcb8ed81f8aa077af SHA-256: 83c24f4c54c9a59f9642b7fab80a239ea67d3166a534083ed66e779884639311
202 Risk Score

Malware Insights

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

The PDF contains numerous links to a redirector service, masquerading as a download for Adobe PDF Reader. The primary redirector URL is `https://ttraff.ru/pify?keyword=adobe+pdf+reader+for+windows+10+offline+installer`, which likely leads to a malicious payload. The document body and heuristics indicate a phishing attempt to trick users into downloading potentially harmful software. No scripts were extracted, but the PDF structure itself facilitates the malicious redirection.

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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.ru/pify?keyword=adobe+pdf+reader+for+windows+10+offline+installer In PDF document text
    • http://files.gogovernors.com/uploads/1/3/1/4/131406762/6528224.pdfIn PDF document text
    • http://files.dharmendhaliah.com/uploads/1/3/1/3/131380899/427d7.pdfIn PDF document text
    • http://vagomug.loganspeacepark.org/uploads/1/3/1/3/131380600/7990018.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/1/0433/0304/3230/files/53867358599.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6240/2967/files/12531772475.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8125/9421/files/23910704885.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5015/5688/files/fetaligabajepugudufod.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2667/7913/files/datupawibepoxilos.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1993/4628/files/types_of_occupational_health_hazards.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4204/6103/files/wepaliwemosorar.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0389/6230/files/lifevurizetijob.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2060/6885/files/demav.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1856/7335/files/m40_concrete_mix_ratio.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3361/6803/files/arthashastra_in_kannada_free_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3849/9235/files/46989264306.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1257/0787/files/fegofosupaxu.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005e18.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E18 5448 bytes
SHA-256: 71cce70308adb824a8f4d9aa3b45cc79221137ca4fd9477c76fb6e260b2c769e
font_01_sfnt_off000070c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x70C1 9900 bytes
SHA-256: 5441b78b7962185db4cf0e71f17c523e839f12bdca4e230a4701342994716b92