Malicious PDF — malware analysis report

Static analysis result for SHA-256 5f387db974360f41…

MALICIOUS

PDF

46.1 KB Created: 2020-08-13 23:02:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 603d1eb1ea42461ae609a3ec0848c782 SHA-1: 95516db4202ea9a5c4aea956687a4e57396c8f95 SHA-256: 5f387db974360f412d985d86878a56aa0e7f8969dc1f893a2142838b84ab0a9e
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links, many of which point to a redirector service (ttraff.com) known for malicious activity. The document body, though heavily obfuscated, contains a reference to the same redirector URL, suggesting an attempt to disguise a malicious link as a free download. The ML classifier also strongly indicated maliciousness.

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=baidu+root+app+free++apk In PDF document text
    • http://wenis.luis-mota.com/uploads/1/3/2/7/132740930/9812497.pdfIn PDF document text
    • http://files.michiganpremier.org/uploads/1/3/0/7/130739225/8980388.pdfIn PDF document text
    • http://files.daniellewestdyk.com/uploads/1/3/1/4/131437636/gituse.pdfIn PDF document text
    • http://files.sfcchicago.com/uploads/1/3/0/9/130969772/4605b14c6e7e.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/1/0431/7665/7057/files/20582979657.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/40035930655.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/3352/4386/files/bohemian_rhapsody_easy_piano_sheet_music_free.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/38967404473.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0568/9504/files/xelereganujax.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6288/6549/files/pdf_watermark_remover_free_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4851/7275/files/rain_beatles_lyrics.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4914/8838/files/melesolezimuvoja.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5797/0328/files/radud.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5022/8119/files/tirasuponifetagunojibun.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8722/4214/files/55020742003.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/0891/5616/files/79359636854.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 5

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

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000771f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x771F 4940 bytes
SHA-256: 6d52d8af6e934e8a3ec661dc054c1d1f7dcda89d88b45ff2ad153f5220e42257
font_01_sfnt_off000087fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x87FE 10352 bytes
SHA-256: 4938dd2188aced57a63599483eab0b992ab4100cb09135fd7eb90961f9b6dedc

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