Malicious PDF — malware analysis report

Static analysis result for SHA-256 e98fca97159adaa0…

MALICIOUS

PDF

50.4 KB Created: 2020-08-12 22:53:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 6d54bc706e07d2386f55c510532abce7 SHA-1: a4f6bbd09eacb232ae8bea834aa26536d6fb3bab SHA-256: e98fca97159adaa0b22360421d87d06d58a458f26ea8256e107f5f986d46e75b
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains multiple embedded links, with one specifically pointing to a known malicious redirector. The document body, though heavily corrupted, contains text suggesting a lure for 'bcsc ophthalmology pdf free download'. The presence of a link farm heuristic further indicates a malicious intent to distribute links, likely for phishing or malware distribution. The primary malicious URL identified is https://ttraff.com/wb?keyword=bcsc%20ophthalmology%20pdf%20free%20download.

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/wb?keyword=bcsc%20ophthalmology%20pdf%20free%20download In PDF document text
    • http://files.conquertheunhealthyyou.net/uploads/1/3/1/6/131606631/782eb87e685252.pdfIn PDF document text
    • http://files.giveitaway.net/uploads/1/3/2/3/132302995/rodaxim.pdfIn PDF document text
    • http://files.oscarthomassr.com/uploads/1/3/0/7/130775292/9720793.pdfIn PDF document text
    • http://rolije.hendrygeosciences.com/uploads/1/3/1/4/131407089/suribogawelarator.pdfIn PDF document text
    • http://files.tischtalentguild.com/uploads/1/3/2/6/132682929/jupevaberepeb.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/1/0438/2159/6834/files/wijurekuxorabeju.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1019/5605/files/sobalen.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/7235/4459/files/katudekikebevi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0355/9583/files/creative_writing_prompts.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4827/1000/files/54085110126.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/2402/9608/files/ziwirikexabomipolij.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0441/0173/0456/files/97029060170.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1256/1819/files/chuyn_t_nh_sang_word.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5446/4165/files/55161043261.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8699/3813/files/3d_printing_in_food_industry.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1467/4841/files/21653710431.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/1574/8253/files/94464793019.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1302/0570/files/vaveleninorexef.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5520/9886/files/array_of_colors.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: keyvanpaydar.com 4 samples

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006e4e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E4E 5552 bytes
SHA-256: 8bfb9c3d2e96180f42b55c57e018510ea308653a3164391790f9675eec8192ba
font_01_sfnt_off0000811d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x811D 14796 bytes
SHA-256: 1bf232444fa057089181a1a49485eab4929051dea8a20b22540a52d6727fb50a
font_02_sfnt_off0000ae22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAE22 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f