Malicious PDF — malware analysis report

Static analysis result for SHA-256 db1ea1c776dd2343…

MALICIOUS

PDF

42.7 KB Created: 2020-08-11 14:57:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 72e4ba4714343252ad93b900307a5c20 SHA-1: eb47e08565455abc6da07ab572c1e31e121bc475 SHA-256: db1ea1c776dd2343c1810425b3d414ccae9f3e976ac0d9b0c496b0f8de10e5e0
194 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to a redirector service (ttraff.ru) known for malicious activity. The document body, though partially corrupted, suggests a lure related to computer networks. The heuristic firings confirm the presence of a malicious redirector link and a link farm, indicating an attempt to drive traffic to potentially harmful 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=advantages+and+disadvantages+of+computer+networks+pdf In PDF document text
    • http://renisosew.danielepiserchia.com/uploads/1/3/0/8/130874359/788f9a4c56e4478.pdfIn PDF document text
    • http://gipiki.endgamefit.com/uploads/1/3/1/4/131407440/97aa02.pdfIn PDF document text
    • http://totomusid.nowdrum.com/uploads/1/3/1/4/131454012/voxelukulowexikedak.pdfIn PDF document text
    • http://files.kccbiz.net/uploads/1/3/1/4/131409508/894e9c9da658680.pdfIn PDF document text
    • http://files.engineeringadmissionsassessment.com/uploads/1/3/0/7/130775017/3353668.pdfIn PDF document text
    • http://www.fotolia.com''gt;Fotolia.com/a'gtIn 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/1/0432/7332/2664/files/hyena_word_generator.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0222/3013/files/rekugufolawofuxuwefil.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2312/3100/files/dizirukuda.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/9914/2810/files/55354935728.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/2468/4955/files/78592497783.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1080/9256/files/ximeli.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1828/8285/files/lozuf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4492/0734/files/xavarunegomarukaxonaz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/3756/2779/files/mac_key_code.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1643/8438/files/ruxinidejuzejimixoxixi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/99231100330.pdfIn PDF document text
    • http://www.fotolia.comIn 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_off0000678c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x678C 5648 bytes
SHA-256: 989bbe6dd86a59c5735c7ebef86d9c1f33fa736d6adce75ebe6097246b810645
font_01_sfnt_off00007acc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7ACC 10252 bytes
SHA-256: 9c31656d6c32a099136f9fa3dc7b6ef0a4ac54e69c34f0c0c75e0ea6f7ee88aa

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