Malicious PDF — malware analysis report

Static analysis result for SHA-256 20fafa0c36f3bb23…

MALICIOUS

PDF

41.5 KB Created: 2020-08-04 16:30:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: f12a997d89b45dac59afa55c9259ca9b SHA-1: cdbdf4d02dea06bc2a2dc723cec5b4ea1aeb4117 SHA-256: 20fafa0c36f3bb237ca6ce0a35b560bff386ca551c27745b2fd5d8acfec7c832
194 Risk Score

Malware Insights

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

The PDF was flagged by a machine learning classifier and heuristics indicate it contains a malicious redirector link and a large number of external PDF links, suggesting a link farm or SEO manipulation tactic. The primary malicious URL identified is https://ttraff.ru/pify?keyword=trumpet+jazz+music+pdf. No scripts were extracted, and the document body was heavily obfuscated, limiting further analysis of the specific lure.

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=trumpet+jazz+music+pdf In PDF document text
    • http://files.meewisseroses.com/uploads/1/3/1/8/131871648/3464655.pdfIn PDF document text
    • http://files.jnaustralia.com.au/uploads/1/3/0/7/130775715/2471478.pdfIn PDF document text
    • http://files.wisemountainyoga.com/uploads/1/3/2/6/132681740/9694647.pdfIn PDF document text
    • http://files.auburnhighfootball.com/uploads/1/3/0/7/130740363/wofowubozilozo_mewebiw_matojikugopej.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/1/0430/6701/5329/files/funny_answering_machine_messages.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9548/1750/files/11323679467.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8316/2019/files/jereridija.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1425/7815/files/electrical_engineering_hambley_solutions_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7992/4902/files/zonavevanexep.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/2998/5430/files/navaki.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2180/2404/files/6100190863.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4907/4336/files/69752409883.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6579/4965/files/90873591903.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/dutevitijenunolekegek.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 1

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_off000062f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62F4 5344 bytes
SHA-256: 060e69e24c0303a73faa333bb4868d335ae1aed09d7e16f41944b7e0d74fc53f
font_01_sfnt_off00007511.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7511 10720 bytes
SHA-256: 29fc4ac0fe21afeea0cd33293a771b122085c8a74e9b60112b4d853e87e37ed5

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