Malicious PDF — malware analysis report

Static analysis result for SHA-256 64454044294d6b60…

MALICIOUS

PDF

42.1 KB Created: 2020-08-19 20:43:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8af6c3b8000d85fa1fb5e2f4e5ed4059 SHA-1: e86106ac9c90c242d7240df671c0e955251093a0 SHA-256: 64454044294d6b609efb59701b547c3c52fd94c28595a78ff3bfdf0a962ba614
154 Risk Score

Malware Insights

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

The PDF contains embedded links that point to a malicious redirector, identified by the 'ttraff.com' domain, which is flagged as malicious. The document body, though heavily obfuscated, contains text suggesting a lure related to 'Castrol oil guide'. The presence of numerous external PDF links, many hosted on Shopify, suggests a link farm or SEO poisoning tactic to distribute malicious content. No scripts were extracted, but the PDF structure itself facilitates the redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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/pify?keyword=castrol+oil+guide+rego
    • http://files.pleasantgreenmethodist.org/uploads/1/3/2/6/132695915/xuzawudejajep.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0430/8513/6021/files/39151619057.pdf
    • https://cdn.shopify.com/s/files/1/0434/3624/5142/files/38116802708.pdf
    • https://cdn.shopify.com/s/files/1/0431/7095/5424/files/17072668259.pdf
    • https://cdn.shopify.com/s/files/1/0430/5901/9933/files/kemam.pdf
    • https://cdn.shopify.com/s/files/1/0431/3910/4917/files/54880807208.pdf
    • https://cdn.shopify.com/s/files/1/0430/6249/3345/files/85186656316.pdf
    • https://cdn.shopify.com/s/files/1/0435/0597/5462/files/tigray_amharic_dictionary.pdf
    • https://cdn.shopify.com/s/files/1/0440/2728/1558/files/sowezogarakudowowoj.pdf
    • https://cdn.shopify.com/s/files/1/0427/4431/6070/files/zibelebuduviwojudujekupa.pdf
    • https://cdn.shopify.com/s/files/1/0431/7144/6939/files/potujurofuvekujavofuwat.pdf
    • https://cdn.shopify.com/s/files/1/0440/5913/2054/files/58387959222.pdf
    • https://cdn.shopify.com/s/files/1/0432/5641/4363/files/comment_lier_plusieurs_en_un_seul.pdf
    • https://cdn.shopify.com/s/files/1/0432/3796/5979/files/javojabakunavidop.pdf
    • https://cdn.shopify.com/s/files/1/0431/6584/3620/files/nutrition_guru_mann.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_off000058de.bin
b0edfc8f7c4963b6fae774d012c0547edb15c9d1c70705723f88328d3d25b285		 pdf-font-stream PDF embedded font (sfnt) at offset 0x58DE 4792 bytes
font_01_sfnt_off0000693b.bin
0fdbd12eebcdeb41f5f3a1d7285c9d2bd17430289e8d4607966772375f7ff783		 pdf-font-stream PDF embedded font (sfnt) at offset 0x693B 10936 bytes
font_02_sfnt_off00008dc3.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8DC3 4324 bytes

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