Malicious PDF — malware analysis report

Static analysis result for SHA-256 a805e9bb754236b0…

MALICIOUS

PDF

38.9 KB Created: 2020-08-25 11:24:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: e0d79c21412fb2a99daae64cb0d0ca4e SHA-1: b7f6a85edf7f2b8ec5a559ed138edfdca83e89ab SHA-256: a805e9bb754236b02238c5c9f923877858dba9509f730817df70995507a94590
194 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links, many pointing to Shopify domains, forming a link farm. One critical heuristic identified a redirector link to 'ttraff.cc', indicating a malicious intent, likely for phishing or malware delivery. The ML classifier strongly supports the malicious nature of this PDF. No scripts were extracted, but the link farm and redirector are sufficient indicators of malicious activity.

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=econometrics+exam+cheat+sheet In PDF document text
    • http://files.eastsidewestsideswcd.org/uploads/1/3/1/8/131856271/8029f.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/1/0430/9732/5732/files/45482444098.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6498/3703/files/45115128348.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5843/8056/files/79776804848.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/vijob.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6365/7119/files/wavig.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0449/8289/4750/files/96808184004.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6710/4668/files/how_to_grow_a_tree_in_minecraft.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/7963/9967/files/90557005748.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6489/2323/files/vinenefu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3685/1874/files/57747628048.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5698/8317/files/12391747111.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/3625/9990/files/wazok.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 3

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_off00005b98.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5B98 5032 bytes
SHA-256: b7eb8f866b8c00cfc269cc20a01de3589569855e46ff8109f80eeca673839958
font_01_sfnt_off00006c7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C7C 10180 bytes
SHA-256: 211cdc2720994775715b7c406f47e0fcf1b8b320a14d8c3f676b26f78c65858f

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