Malicious PDF — malware analysis report

Static analysis result for SHA-256 0dc8e1257c745bcc…

MALICIOUS

PDF

42.9 KB Created: 2020-07-30 21:51:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 18b4ba21ccc4c8cb85b4702411035c6b SHA-1: ab27de99865a1aa1777d98342296884a2f131c10 SHA-256: 0dc8e1257c745bccf492060f5db6bd5d661ee1024dc2e9f6c45d5ec3fc3cdab9
194 Risk Score

Malware Insights

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

The PDF contains numerous links to external resources, many of which point to a redirector service (ttraff.ru) that is flagged as malicious. The document body, though heavily obfuscated, suggests a lure related to 'crowdsourcing'. The presence of embedded URLs and the ML classifier's high confidence score indicate a malicious intent to redirect users to potentially harmful content or phishing sites.

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.ru/pify?keyword=que+es+el+crowdsourcing+pdf In PDF document text
    • http://files.theblackpoolplayroom.com/uploads/1/3/2/6/132695428/5789890.pdfIn PDF document text
    • http://files.runcibletheatre.org/uploads/1/3/1/8/131857717/ee8d6.pdfIn PDF document text
    • http://files.pacificcoastvolleyballclub.com/uploads/1/3/1/3/131380612/9291476.pdfIn PDF document text
    • http://files.breathingspacecounsellingpractice.com/uploads/1/3/2/7/132712040/6a56c9649c6.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/1/0432/9940/5979/files/vusinamoti.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7977/0019/files/16360088724.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9304/0029/files/zuvawerobuxidadenu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1126/0062/files/34861696279.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/66179678401.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/6636/8935/files/5478075601.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7190/5698/files/985956897.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9429/4171/files/47555326247.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1392/3228/files/wudamejudira.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5066/3062/files/xutukejekivusuwifiv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5415/4406/files/zeniritivut.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_off00006b7e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6B7E 5068 bytes
SHA-256: 51f1376feaa98ef14532dab9df895f7a1cd5799c1d03ee03563223c14d222ef4
font_01_sfnt_off00007cd2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7CD2 9928 bytes
SHA-256: e2a76f658f14a6c9a4c09e1b33b0902c569fedd71d5ce15c7a004f1594c9131f

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