Malicious PDF — malware analysis report

Static analysis result for SHA-256 2a1589f04060f944…

MALICIOUS

PDF

70.3 KB Created: 2020-08-08 05:28:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: bb7ea18d48126c152c5dba52bcd48d89 SHA-1: 23b99f00abc83af3a36281ecc6d7ecd73b9a2dbd SHA-256: 2a1589f04060f94404573a4209823443c78bc3485b0e9e4ccc087754dbf1be7b
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a significant number of embedded links, with a critical heuristic firing for a PDF link farm. One of the embedded URLs, 'https://ttraff.com/wb?keyword=ventilador%20de%20techo%20westinghouse%20manual', is identified as a malicious redirector. The ML classifier also strongly flagged this PDF as malicious. The document body appears to be corrupted or obfuscated, but the presence of the malicious URL and the link farm heuristic strongly suggest a malicious intent, likely to lure users to malicious content or phishing pages.

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/wb?keyword=ventilador%20de%20techo%20westinghouse%20manual In PDF document text
    • http://files.communityproblemsolvingday.com/uploads/1/3/2/8/132814071/nokigusoto.pdfIn PDF document text
    • http://files.voiceofgodrevivalsministrie.org/uploads/1/3/1/0/131069887/jimetugejenodo.pdfIn PDF document text
    • http://jolovebi.ailienvuong.com/uploads/1/3/1/0/131070718/56791.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/1/0433/9639/9265/files/54948811197.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3340/2266/files/xususatimefidimefaf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5719/1843/files/vobofomesonikamufakug.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4472/4133/files/15641493768.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6404/1373/files/master_organic_chemistry.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8984/4637/files/29553952170.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0812/3303/files/5140564045.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/6705/7063/files/84968513394.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0449/7912/6431/files/a_room_of_one_s_own_free.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8406/2622/files/37523006295.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7133/2767/files/89659803755.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8611/9079/files/21783005177.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4853/3142/files/nexiwiruvununiwotoselu.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 6

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_off0000d6c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6C8 5412 bytes
SHA-256: d8fe9736996fa06a21335c1b2b4775b0d8bdde7c032ea11ae2b3120faad9675a
font_01_sfnt_off0000e918.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE918 10176 bytes
SHA-256: 69d1c4e8dfbff6dabdf67ffc9b03add6d1fd6c028615c0093adc4aad7767e32a

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