Malicious PDF — malware analysis report

Static analysis result for SHA-256 874dc97b5d19e9f9…

MALICIOUS

PDF

47.8 KB Created: 2020-08-04 04:09:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: d96d5f09e2c8ac4f3325a605e5ff4498 SHA-1: bd50a98d4022a7e65d675efb9f2ae3c5e32653a2 SHA-256: 874dc97b5d19e9f92deb23e35edff8ecf72542900ec5c018a1af623248a8620a
194 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to a redirector service (ttraff.com) which is flagged as malicious. The document body, though heavily obfuscated, contains the same redirector URL and appears to be a lure for a PDF download. The presence of embedded URLs and the ML classifier's high confidence score support this assessment.

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=abraham+maslow+y+su+teoria+pdf In PDF document text
    • http://files.bellabugphotos.com/uploads/1/3/1/4/131406781/8580f0c48a.pdfIn PDF document text
    • http://files.gibdevelopments.com/uploads/1/3/1/8/131871622/pudunigutegul_xuwozepeba_nojarew.pdfIn PDF document text
    • http://files.asa989.org/uploads/1/3/1/6/131637409/d88aba.pdfIn PDF document text
    • http://pipofazi.aquariumsalesandservice.com/uploads/1/3/0/8/130814058/e9758.pdfIn PDF document text
    • http://files.littlegiantsbands.org/uploads/1/3/1/3/131380623/6095352.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/1/0432/5795/4467/files/gogotumibatale.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0223/2983/files/68532956132.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9020/6117/files/55208113323.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/0595/0626/files/rifoxasopire.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2658/7549/files/20810711545.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0500/8293/files/22229792161.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1400/3610/files/casio_fx-_115es_plus_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4593/6534/files/1_99_farming_guide_osrs.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2571/0750/files/39689630039.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7243/7913/files/denelarosakodadokodebakig.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000079fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x79FC 5604 bytes
SHA-256: 80d9e98d84af3ce33f0e507babafa3adaad4f9e1bf851df4766c4433553b1423
font_01_sfnt_off00008cf1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8CF1 10988 bytes
SHA-256: 7478b89a5c1c059b8227dbeaca2b7cefc8a23203f32ef1f17fb32d4650f0b2e8

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