Malicious PDF — malware analysis report

Static analysis result for SHA-256 0387ef6e1a230c15…

MALICIOUS

PDF

39.7 KB Created: 2020-09-04 10:58:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8fe5cc063fd87fbcec62e4f2658b4e74 SHA-1: 1ccec50c3b0fdb2d73a076a43c830571b0d45cd3 SHA-256: 0387ef6e1a230c1567593458721ce589465807d51c964dedfc1cb5255a300b82
174 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.me/wix?keyword=division+fluency+worksheets+pdf'. The document body, though heavily obfuscated, also contains this URL and numerous other Shopify links, suggesting a link farm or SEO manipulation tactic. The presence of a QR code lure heuristic further supports a phishing or redirection attempt.

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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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.me/wix?keyword=division+fluency+worksheets+pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0439/4916/2654/files/2002_bombardier_rally_200_service_manual.pdf
    • https://cdn.shopify.com/s/files/1/0428/0067/7031/files/3246559196.pdf
    • https://cdn.shopify.com/s/files/1/0462/5144/2327/files/nissan_almera_tino_1998_manual.pdf
    • https://cdn.shopify.com/s/files/1/0433/2224/5273/files/32565383476.pdf
    • https://cdn.shopify.com/s/files/1/0434/0357/5454/files/kewawipixiduf.pdf
    • https://cdn.shopify.com/s/files/1/0437/6382/6849/files/79189970151.pdf
    • https://cdn.shopify.com/s/files/1/0432/8102/3140/files/nelirirupipufibotirape.pdf
    • https://static.usrfiles.com/ugd/269bb8_b7f4313af74f4459bf8c9575e1a7fc44.pdf
    • https://static.usrfiles.com/ugd/c33cdb_c839ca91297c40eaaef0055f05463da9.pdf
    • https://static.usrfiles.com/ugd/b8c837_48d56d99f5db44099dd19650b14b9f03.pdf
    • https://static.usrfiles.com/ugd/035627_98b9a9ed0cc244a2a5c8221b27a4637f.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005d2e.bin
2e3970f2fa428147157ca31949a5823959244322292c6b6fdbbdd1c85cf33295
pdf-font-stream PDF embedded font (sfnt) at offset 0x5D2E 5352 bytes
font_01_sfnt_off00006f8a.bin
b07719e93bcffbcde1bd0463da55c0b4d8ca34aa1e306029e2f942eb28db9df7
pdf-font-stream PDF embedded font (sfnt) at offset 0x6F8A 10288 bytes