Malicious PDF — malware analysis report

Static analysis result for SHA-256 87693fb1587606c0…

MALICIOUS

PDF

37.4 KB Created: 2020-08-12 08:57:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 5d9e9aeb089e62ae1493e2adca29659a SHA-1: d15300a91e3e2f13f48814fe74c8ca3172735270 SHA-256: 87693fb1587606c0e1fda5ef91086b37e84a7055a7c76420a31746cfa46d8eb1
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, with a critical heuristic firing indicating a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains text and URLs suggesting a lure related to a 'badminton score sheet' to disguise the malicious intent. The presence of a large number of external PDF links, many pointing to Shopify, further supports the SEO link farm heuristic, indicating an attempt to drive traffic to malicious 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=badminton+score+sheet+pdf In PDF document text
    • http://files.gozamurai.com/uploads/1/3/1/4/131406510/8e833cb129.pdfIn PDF document text
    • http://files.benfranklintech.net/uploads/1/3/2/8/132815359/gemobugasuzo-xuduketasap-mewixaju.pdfIn PDF document text
    • http://jijumogu.sandrabekvalac.com/uploads/1/3/1/6/131606069/pejavatumuve.pdfIn PDF document text
    • http://files.amybrycewatercolors.com/uploads/1/3/1/4/131437370/jolis-romibofoxil.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/1/0428/6126/5062/files/wikujuwaxewuviravotusa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5067/2033/files/81383554187.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8642/0893/files/secondary_growth_in_monocot_stem.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1313/4757/files/anime_girl_gets_hit_by_truck.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/mefiwi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5308/8919/files/xatejetimaleruxuwupurijat.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8333/2772/files/juvunoridubevefatolivip.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1958/3133/files/tekafitego.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8716/7645/files/zhuyin_chart.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/5086/6590/files/zumazeto.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 5

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_off000055c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x55C5 5412 bytes
SHA-256: 41a56199facafd32879fe5053e769004770995a6d55ac011d0f054c2f8b234ac
font_01_sfnt_off000067fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x67FB 9640 bytes
SHA-256: 231b194cd6a4f3f79fb10e1a422b9f3729d105c5d1dcec4439be2bcd83bcf17b

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