Malicious PDF — malware analysis report

Static analysis result for SHA-256 a3b91101ec92c0c7…

MALICIOUS

PDF

42.5 KB Created: 2020-08-23 07:00:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 430f771a21e054fe4f52cf4ebb8751d3 SHA-1: 15435f2e0b8f5da49e8b4d4e9afada6e64489e44 SHA-256: a3b91101ec92c0c736988443bd6529b1bc86fd41ad93b1199d6f8b0e8ea5ee2a
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a malicious redirector link disguised as a Hepatitis C treatment guideline. This link, 'https://ttraff.com/pify?keyword=hepatitis+c+genotype+2+treatment+guidelines', leads to known malicious infrastructure. The document also contains a large number of embedded links, many pointing to shopify.com, which is likely part of a link farm to improve SEO for malicious content. No scripts were extracted, but the primary attack vector is the malicious URL.

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=hepatitis+c+genotype+2+treatment+guidelines In PDF document text
    • http://files.lampstandlearningcenter.com/uploads/1/3/2/6/132681482/jomilapuvotutavuw.pdfIn PDF document text
    • http://xudola.austindiadelosmuertos.org/uploads/1/3/1/3/131383483/rabiwelemezof_gonodizo_pukalofemodi_xopumazima.pdfIn PDF document text
    • http://files.tailoredrides.org/uploads/1/3/1/4/131438844/1720289.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/1/0433/3528/6943/files/73591368652.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1284/8790/files/7315501991.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6359/1583/files/sabomedilutebememawo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2327/7973/files/top_books_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0158/5570/files/bumafedagedigi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7192/1571/files/mefim.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/5302/1334/files/john_deere_lawn_tractor_parts.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3633/4490/files/reading_comprehension_grade_2.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1475/7288/files/payment_request_form_gmu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2512/9891/files/behaviorisme_dfinition.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 4

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_off000065b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x65B2 5588 bytes
SHA-256: 1f697abbb32788187880fcd1ff0e103cfe1282fca9d9ab22f7be3e996ce270ad
font_01_sfnt_off0000789d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x789D 10584 bytes
SHA-256: 7c4af093bc98dd3eed0d0a7a898847363b44f9701713e684db8c16e67334d2b0

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