Malicious PDF — malware analysis report

Static analysis result for SHA-256 a844fdc297a04466…

MALICIOUS

PDF

36.8 KB Created: 2020-08-01 16:46:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 53b2be64fda5bdef19674bcd7c35f7cb SHA-1: dbfd413c7dcb20b2713c6948a08b58113bc81d24 SHA-256: a844fdc297a044662f4e2bf6e5806e856c4037e8c32220d8c8f66ac900fce60a
194 Risk Score

Malware Insights

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

The PDF contains a link farm designed to appear as legitimate downloads, but the primary link redirects to a known malicious redirector. The document body, though heavily obfuscated, contains the string 'https://ttraff.cc/pify?keyword=engineering+economic+analysis+12th+edition+pdf+online', indicating the lure. The presence of numerous external PDF links, many hosted on Shopify, suggests a SEO poisoning or link farm tactic to distribute malicious content.

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.cc/pify?keyword=engineering+economic+analysis+12th+edition+pdf+online In PDF document text
    • http://files.smartstartdriving.ca/uploads/1/3/1/0/131071164/sanugofo_zimesepap_lusizojirabu.pdfIn PDF document text
    • http://files.intimatesmallweddings.com/uploads/1/3/1/4/131436980/1752441.pdfIn PDF document text
    • http://files.holsworth.net/uploads/1/3/1/3/131384674/vudaxanuruvo_zozifovakuk.pdfIn PDF document text
    • http://files.mexpup.com/uploads/1/3/0/8/130814043/1709668.pdfIn PDF document text
    • http://files.mauileathersmith.com/uploads/1/3/1/4/131482946/2483629.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/1/0431/2901/2381/files/vetemidetixojatopuxowome.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/vitalifurefafimeribedewo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5622/6716/files/wowegobib.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/94662163826.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0351/8882/files/nirasuje.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5144/9496/files/92824489801.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7208/6423/files/runebazuw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6504/1311/files/nodirarokagutej.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8491/3563/files/dugufe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/2215/3890/files/zuvawakufadaw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3685/8773/files/kingdom_heart_1._5_remix_walkthrough.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5569/3470/files/rururu.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_off00004f85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4F85 5812 bytes
SHA-256: 6a3eb87cc226dc37cd8c3eb9fb2dbc12afe5f061a31cfdf023258cd8d155616f
font_01_sfnt_off0000633b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x633B 10200 bytes
SHA-256: a49b288412d7f8a554f75211b47df59c8f713882a80de776dd9b0aea263bc29f

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