Malicious PDF — malware analysis report

Static analysis result for SHA-256 81e907cb79be7aea…

MALICIOUS

PDF

41.0 KB Created: 2020-08-12 08:16:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 57a91d9b01d56eb93b26c6dbc56e6706 SHA-1: d35c2dcefcdf73f695388959b20add653fe2480b SHA-256: 81e907cb79be7aeaf6df3941336469d4755e7d73d2037a31eccb97e421add553
194 Risk Score

Malware Insights

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

The PDF contains numerous links, many of which point to a redirector service (ttraff.cc) that is flagged as malicious. The document body, though heavily obfuscated, contains the same redirector URL and several benign-looking Shopify URLs, suggesting a link farm or SEO poisoning tactic to lure victims. The primary malicious URL is https://ttraff.cc/wb?keyword=sejarah%20kacang%20kedelai%20pdf, which likely leads to a phishing or malware download site.

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.cc/wb?keyword=sejarah%20kacang%20kedelai%20pdf In PDF document text
    • http://files.pre-protein.com/uploads/1/3/2/7/132710690/nuziwedunino-fonusozudineve.pdfIn PDF document text
    • http://jowolaza.turnerintottenham.uk/uploads/1/3/2/6/132680813/5902257.pdfIn PDF document text
    • http://pirupi.christopherbmooneystudios.com/uploads/1/3/0/8/130874359/jibovawupor.pdfIn PDF document text
    • http://files.mrsferrell.com/uploads/1/3/1/8/131856040/cd6bb71f1db.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/1/0435/3762/9348/files/pawogapudozinigevu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9888/1704/files/73748858072.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0146/2436/files/2889921140.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3240/4380/files/70290517985.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/2806/0059/files/dupazase.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6284/4837/files/add_page_break_in_jspdf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6172/9685/files/13362357736.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6538/4866/files/84664241167.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6212/2903/files/janopi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2201/6934/files/zakilaga.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6042/8962/files/25956809953.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5313/7576/files/85249619280.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 3

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_off0000625c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x625C 5480 bytes
SHA-256: 7706c33c832f95d748c81627b93ba79fa4c635573e3293c2ab78e46721888e7a
font_01_sfnt_off000074fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x74FB 10020 bytes
SHA-256: 81d4b30bec4caa3d7d29cfe0e1df2c606ec03b1076f67874e145f3c4c0bca040

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