Malicious PDF — malware analysis report

Static analysis result for SHA-256 37224718affd32ea…

MALICIOUS

PDF

51.4 KB Created: 2020-09-15 12:53:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 010a732bd709f11645f03995536c791a SHA-1: 494cc539a8e62e9b334e195a8b6a33aff8323903 SHA-256: 37224718affd32eaf91622d44babc778face012d0251d1899119d64c65e297dc
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, which is also present in the document body. This link, 'https://ttraff.cc/wb?keyword=gigabyte%20ga-970a-d3%20manual', is designed to lure users into clicking it by appearing to offer a relevant manual. The presence of numerous other external PDF links, many hosted on suspicious domains, further indicates a malicious intent, likely to distribute further malware or engage in SEO-based traffic generation for malicious sites.

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=gigabyte%20ga-970a-d3%20manual In PDF document text
    • http://levewezas.amandadavisart.com/uploads/1/3/1/4/131407558/5590980.pdfIn PDF document text
    • http://files.ktrpo.com/uploads/1/3/0/8/130874615/dbc2e6e3e2a.pdfIn PDF document text
    • http://files.sorellacalisthenics.com/uploads/1/3/0/7/130775001/9057554.pdfIn PDF document text
    • http://files.christinebrumbaughdesign.com/uploads/1/3/1/4/131407898/lutojosu_gadizuzin_lebejirotivipi_gosagugukomavu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://static.usrfiles.com/ugd/b56239_a55585f802b44de599cd72a5c145d807.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/a4e402_4266cb030254438580ecf37914ac46ab.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/5af86b_31ca3b5a5398445b9bc5d4d7d24fe183.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_b58bd7371b9e4bb192edae163889cf27.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/96768c_e8f8cd5d2ec5473a9aa98a6e8fb45ace.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8037/5715/files/tamosogijodoxamisezesez.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0808/9509/files/gukozuz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6859/6123/files/gifejebidigobonalorilal.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/4385/4235/files/kenmore_elite_refrigerator_service_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9072/2454/files/kunixomika.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000065ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x65EE 5492 bytes
SHA-256: 3ceebde29300b0e84787a614284ae75985de3661c3f3d64e2f7df580baff87dc
font_01_sfnt_off00007898.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7898 10652 bytes
SHA-256: 34d2d6a55f441fe69950431dda9fdb53b6e4d873b07ce67df9f93785412510f9
font_02_sfnt_off00009d4e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9D4E 16204 bytes
SHA-256: 6ff35bbcdef839a823e086214e5d609f702bf6b4484614f6c4b824d32b7fcc76
font_03_sfnt_off0000b27d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB27D 4324 bytes
SHA-256: ad623bc7c681097dfa1224999cf6cc6072d3ca9a137655dc1129b0261f0b357c