Malicious PDF — malware analysis report

Static analysis result for SHA-256 a231f83072755b8d…

MALICIOUS

PDF

41.6 KB Created: 2020-08-09 20:06:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: d5742009814f0483602988cef661a7f6 SHA-1: cec72598d49b4efa3d85eaa7fdde5549a9cf11c0 SHA-256: a231f83072755b8dc554c69c104eb297094741b12f3622001e57f801047759bb
194 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. The document body, though heavily obfuscated, also contains this URL, suggesting it's the primary lure. The PDF also exhibits characteristics of a link farm, with numerous embedded URLs, many hosted on Shopify, likely for SEO manipulation to increase visibility of the malicious redirector. The ML classifier also strongly indicated maliciousness.

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.com/pify?keyword=abstract+algebra+problems+pdf In PDF document text
    • http://files.smallcoffee.ca/uploads/1/3/1/3/131383434/bimenagidefa_jotoziw_pigojajisapas_sunidexogubut.pdfIn PDF document text
    • http://files.vafercapital.com/uploads/1/3/0/7/130775867/nivej_gusakigaveg_dijerikikezade.pdfIn PDF document text
    • http://files.leandremeldener.com/uploads/1/3/0/9/130969190/3481642.pdfIn PDF document text
    • http://files.dianajart.com/uploads/1/3/1/4/131482878/6018816.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/1/0430/3300/2145/files/32505767549.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1325/0965/files/veguxe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0134/7226/files/noxokamemaluvupopofekibet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3469/8147/files/email_id_list.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/7128/4135/files/online_to_word_converter_with_editing_options.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6452/3926/files/mozesefikedumoleg.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3236/3676/files/73813260005.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5035/3318/files/51139582287.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3341/9160/files/asturias_guitar_free.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6421/4182/files/metro_lisboa_mapa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/8223/4521/files/sql_lookup_table.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1821/3797/files/gomelofogoxuwop.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_off0000643f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x643F 5604 bytes
SHA-256: 0c801e1a4ee8e6616cd4f084c9e3a74462dc6e2da81e57ff3433e5077b099112
font_01_sfnt_off00007733.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7733 10080 bytes
SHA-256: fb9907b4b8ea771cbc9298443819fec8cf46e7540faf6fad4e795fd39bba3bd5

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