Malicious PDF — malware analysis report

Static analysis result for SHA-256 738bb75656ba7026…

MALICIOUS

PDF

43.1 KB Created: 2020-08-29 17:10:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 01b0047fe4b90d697cfc0a2712f9d4a8 SHA-1: 21be461fc8709d5e1eb7bc00e85de1e0c64aa06b SHA-256: 738bb75656ba702664255b762b82f26a14024441131c92eb95e47fb0db0a7b05
162 Risk Score

Malware Insights

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

The PDF contains a high number of embedded links, with at least one identified as a malicious redirector. The heuristic 'SE_INVOICE_LURE' suggests a deceptive intent, likely to trick users into clicking the malicious URL. The presence of numerous Shopify links, including one identified as a potential lure, further supports a phishing or malware distribution scheme.

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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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=rta+etag+battery+life
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0437/4819/6513/files/johnson_outboard_service_manual_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0437/7296/9109/files/38162997237.pdf
    • https://cdn.shopify.com/s/files/1/0431/0348/6103/files/vituru.pdf
    • https://static.usrfiles.com/ugd/b8c837_fdb3730494f145839d7673189440b9b3.pdf
    • https://cdn.shopify.com/s/files/1/0437/7437/8138/files/tosifomepepojipunutitamor.pdf
    • https://cdn.shopify.com/s/files/1/0435/8311/1336/files/exponential_in_matlab.pdf
    • https://cdn.shopify.com/s/files/1/0430/6891/5863/files/conversation_anglais_et_franais.pdf
    • https://cdn.shopify.com/s/files/1/0429/5298/2684/files/pedewi.pdf
    • https://cdn.shopify.com/s/files/1/0431/5663/5816/files/cpdt_study_guide.pdf
    • https://static.usrfiles.com/ugd/b8c837_1a0088304dd743208e9aae5d234ebfd4.pdf
    • https://static.usrfiles.com/ugd/b8c837_20c74f2cbcf343fa86598e2745b36408.pdf
    • https://static.usrfiles.com/ugd/b8c837_b2310afeaac745869d814c728603b873.pdf
    • https://static.usrfiles.com/ugd/b8c837_39a44fc9681047a7a18a1bb62915b09d.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005f7b.bin
c308d5fccdb3101222d7b9cf12b132349cc316578a075be9eea37cd2553c6594		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F7B 4576 bytes
font_01_sfnt_off00006f2a.bin
909932199617443f6215cf0d5dacda2da64a1ff6c07d390c70f68a156c37f733		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F2A 10196 bytes
font_02_sfnt_off000091e5.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x91E5 4324 bytes

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