Malicious PDF — malware analysis report

Static analysis result for SHA-256 2a1750a65f6a51c7…

MALICIOUS

PDF

57.2 KB Created: 2020-08-09 19:03:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: c2db9e9e8d65999939caffe30aaa524b SHA-1: 7806a2db4984d5cbc56247fb81f6305b939f2110 SHA-256: 2a1750a65f6a51c7dc798b5af3f00b2c7f2b207868fb3a80a50094f0979b7160
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.ru/pify?keyword=manual+completo+de+aberturas+de+xadrez+pdf'. This URL is presented within the document body, disguised as a chess opening manual, to entice users to click. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the presence of a malicious redirector is sufficient to classify the attack pattern.

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=manual+completo+de+aberturas+de+xadrez+pdf In PDF document text
    • http://files.equityallies.org/uploads/1/3/1/4/131408572/3522063.pdfIn PDF document text
    • http://files.melbournegallbladdercentre.com.au/uploads/1/3/1/3/131382274/paxetifupekiz-vunimibutaviju.pdfIn PDF document text
    • http://fomixad.viholisticnutrition.net/uploads/1/3/1/6/131636725/tebawamox_busepi_joxuminanib.pdfIn PDF document text
    • http://files.fijifreshkava.com/uploads/1/3/2/8/132816066/62df9b0ea6045ff.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/1/0432/6991/4782/files/ielts_general_speaking_samples_band_9.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/5947/6630/files/vimivejaguzudukuxiko.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4351/1706/files/atresia_duodenal_clasificacion.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/7345/2697/files/ufc_3_cheats.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3142/8248/files/alphabet_letter_tracing.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0446/7389/2515/files/blood_pressure_chart_by_age.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/9865/1288/files/pezisel.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7243/7910/files/xisebakud.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5704/4890/files/98028593379.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2376/1571/files/30775416187.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7588/7523/files/ziwazanepobufonawu.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_off0000a0d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA0D6 5564 bytes
SHA-256: eb81a5c6fbf572e63e17cb6cc3bd56b48c97030254df8da7b810b02ba0ac7c91
font_01_sfnt_off0000b3c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB3C0 10904 bytes
SHA-256: 0cda0f354eaab7e7f91c61ef67f45185fdc09c4c4de22f40731968590e742bdb

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