Malicious PDF — malware analysis report

Static analysis result for SHA-256 b37aaef18585004c…

MALICIOUS

PDF

54.5 KB Created: 2020-08-29 12:04:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: f03feee8241e479fee05b6e12435e843 SHA-1: cd10d90c6ea722661a10243a888111002f839134 SHA-256: b37aaef18585004cc6dfc8abc5dd1c52f907552b8de6b016c39585ca06952032
194 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to Shopify domains hosting other PDFs, forming a link farm. One critical heuristic identified a direct link to a known malicious redirector, https://ttraff.cc/wix. This suggests the document is designed to lure users into clicking through to malicious infrastructure, likely for further exploitation or phishing. No scripts were extracted from this sample.

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/wix?keyword=cable+selection+chart+for+3+phase+mo In 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://cdn.shopify.com/s/files/1/0438/1740/2530/files/bf4_emblem_import.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8221/1735/files/boboreg.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3191/0821/files/ruruse.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1179/1253/files/63041710932.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_8e395afa37c741ad82cdaeddfe46f226.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/162fe6_7ec842643387463babdb582bccd0849d.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_decc3acde8e745f49dd151d6a3a7a0a7.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_00b0f315ce69400b92392478d17f8673.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_b9a62c270f324bc7b01851bbe0b92512.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_efec9eb68e56477fb6a6a8eed6735244.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_8f994760ee454f9daf7516dd194d8805.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_847af44f1b3546cfb31964275fee38e1.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_4ddb9238b4a44bd2b891773f8756251b.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1061/2635/files/11280275607.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0466/8630/6468/files/44467050907.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8742/0835/files/anatomy_and_physiology_book_openstax.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007e5c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7E5C 5368 bytes
SHA-256: 495b6706ae99a3d266713e9769a9ad893940716995fd9c4cb90df5cd9297261c
font_01_sfnt_off00009062.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9062 15104 bytes
SHA-256: 9d5c1ca9b047ab66ee334a18542a1201de65bbaabbb68842193db9a097d59a26
font_02_sfnt_off0000befd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBEFD 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71

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