Malicious PDF — malware analysis report

Static analysis result for SHA-256 68455545cdadb842…

MALICIOUS

PDF

47.3 KB Created: 2020-08-02 05:38:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e61cca46e54909b87598e997e9177009 SHA-1: 7f54fedb2aa04a76778bc621c5be4f8f7b4d59b4 SHA-256: 68455545cdadb84229f8450e13e7379546fb97e6e9e01543557857b3062bd4aa
154 Risk Score

Malware Insights

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

The PDF contains a high number of embedded links, many pointing to external PDF files, which is indicative of a link farm or SEO manipulation tactic. One of the primary links, 'https://ttraff.cc/pify?keyword=pulled+files+appear+untracked+github', is flagged as a malicious redirector. The ML classifier also strongly indicated maliciousness. While no scripts were directly extracted, the PDF structure and embedded links suggest an attempt to direct users to malicious infrastructure.

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.cc/pify?keyword=pulled+files+appear+untracked+github
    • http://files.artbyalisonnewth.com/uploads/1/3/0/8/130814861/3149941.pdf
    • http://files.actingcoachlasvegas.com/uploads/1/3/2/6/132681566/lejele.pdf
    • http://files.milepost0creative.com/uploads/1/3/1/3/131380177/tevebi.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/7410/1160/files/57943272499.pdf
    • https://cdn.shopify.com/s/files/1/0432/1030/9787/files/xigomitazetanamavabapuno.pdf
    • https://cdn.shopify.com/s/files/1/0432/3947/3314/files/48789102461.pdf
    • https://cdn.shopify.com/s/files/1/0432/7155/3189/files/xixevifozakuranadoror.pdf
    • https://cdn.shopify.com/s/files/1/0434/6957/0198/files/gifobarafutegupevomisif.pdf
    • https://cdn.shopify.com/s/files/1/0432/3786/7687/files/mugipepubuzeni.pdf
    • https://cdn.shopify.com/s/files/1/0429/8909/3018/files/radokugiwerotaves.pdf
    • https://cdn.shopify.com/s/files/1/0433/0697/5382/files/36999706177.pdf
    • https://cdn.shopify.com/s/files/1/0440/4104/4118/files/veduvig.pdf
    • https://cdn.shopify.com/s/files/1/0434/8333/2772/files/womurok.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_off000078d6.bin
ff278d82add73c195664fd99b57b95c0ed56e6c1f8a936381a86888d067af4d8
pdf-font-stream PDF embedded font (sfnt) at offset 0x78D6 5624 bytes
font_01_sfnt_off00008bf1.bin
fe2e3c1da291e97cd9f25381a09ff076aa5e9c1c3aee681b990ab86716d8859b
pdf-font-stream PDF embedded font (sfnt) at offset 0x8BF1 10572 bytes