Malicious PDF — malware analysis report

Static analysis result for SHA-256 7a78db869540905a…

MALICIOUS

PDF

37.8 KB Created: 2020-08-15 05:52:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 849bb6becdb72c6bd55448273e3f2f24 SHA-1: a4a81ea624fb3dec4de99011cd23ccd6a0ef8cbe SHA-256: 7a78db869540905af7f854feacae93cb702f7d80534897d6c1b755cbf0c46129
194 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to malicious infrastructure, specifically a redirector at 'ttraff.cc'. The document body, though heavily obfuscated, contains text suggesting a lure for 'cert basic training participant manual', likely a phishing attempt to drive traffic to the malicious URL. The ML classifier strongly indicates maliciousness, and the presence of numerous external PDF links further supports a malicious intent, likely for SEO-based phishing or malware distribution.

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=cert+basic+training+participant+manual In PDF document text
    • http://files.willowwildedges.com/uploads/1/3/1/8/131856443/xukopiwome-tojazelapiz-kasivezobisu-sunezurawuse.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/1/0431/5676/6882/files/55695796560.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7346/1660/files/xadurujemekupuxal.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3955/4727/files/gurofijepifetiximovivawe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2758/6457/files/17112160382.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0185/5646/files/womojaguwodomuzifem.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8627/4977/files/basics_of_networking_and_communication.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/4312/5405/files/2997861760.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4764/8406/files/wipalo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0820/4704/files/womove.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6828/3294/files/rilonuji.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_off00005658.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5658 5300 bytes
SHA-256: 226467e9d6a472db03bdf2967445a0557d266fbcce5514ba5f9a626eafea084d
font_01_sfnt_off0000683b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x683B 10012 bytes
SHA-256: ab182cf018a6b0ecf1056ee64d301f4dc4fcabdadfcceb22f87f2b1f7692c058

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