Malicious PDF — malware analysis report

Static analysis result for SHA-256 8553b691f770bad6…

MALICIOUS

PDF

39.6 KB Created: 2020-08-25 08:46:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: d01a527791b2b03f8759c9e2765cfd3a SHA-1: 5d7fd2708fdc9cc517bac28ef4ed368a66442e63 SHA-256: 8553b691f770bad6d294e2c8452e794e38ca0a27c0e85503cc21ee6b37cd61ea
194 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many pointing to a redirector service identified as malicious. The document body, though heavily obfuscated, contains text suggesting a lure related to 'mind teasers' and includes the malicious URL. The presence of multiple external PDF links, some benign and some unknown, suggests an attempt to blend malicious activity with seemingly legitimate content, likely as part of a phishing or scam campaign.

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=mind+teasers+with+answers+pictures In PDF document text
    • http://files.rutherglenlamaisonstarnaud.com/uploads/1/3/0/7/130775011/3484955.pdfIn PDF document text
    • http://gimagab.chrisczubatyphotography.com/uploads/1/3/1/3/131379246/665119.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/1/0456/8360/5663/files/bose_micro_bluetooth_speaker_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/7266/0390/files/twist_of_the_wrist_trke.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2363/7402/files/49278552341.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3963/7155/files/lusabogaf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/budazasinopuxa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/9674/4871/files/samidano.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9693/2505/files/foxikizugerelibasamif.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0462/7755/8432/files/22249976780.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0349/5071/files/95104803095.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_off00005ccd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5CCD 5228 bytes
SHA-256: 578129fe8d04d90b936656400102703754b07edcc1f983a2994d9a005c64d79a
font_01_sfnt_off00006e9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E9D 10332 bytes
SHA-256: cbc6f646a6f792aa6067825fd4685f5a8ca7512f0bfeaac58a4c0be55f0049dd

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