Malicious PDF — malware analysis report

Static analysis result for SHA-256 64bea435af3ab6a7…

MALICIOUS

PDF

35.7 KB Created: 2020-08-22 17:28:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 94dfc29752d17c05de861d19a916f31d SHA-1: da1ac0bb4a14b34053feaf3801f0f6c3c7fb4124 SHA-256: 64bea435af3ab6a751887c9d301325984df9f86f55fa1e90513bac85cd880da9
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many pointing to Shopify domains hosting other PDFs, suggesting a link farm or SEO manipulation tactic. One critical heuristic identified a link to a known malicious redirector infrastructure at 'https://ttraff.cc/pify?keyword=ak+47+images+hd'. The document body, though heavily obfuscated, also contains this URL, indicating its likely purpose is to redirect the user to malicious content. No scripts were extracted, but the presence of malicious links and the ML classifier's high confidence score strongly suggest a phishing or redirection attack.

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=ak+47+images+hd
    • http://lamufip.barge-aviation.com/uploads/1/3/1/0/131070710/191018.pdf
    • http://files.rechoir.co.uk/uploads/1/3/1/4/131437812/ed9770e5f4dfd3.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0446/5029/9555/files/js_to_lowercase.pdf
    • https://cdn.shopify.com/s/files/1/0434/5063/0296/files/xixeripulife.pdf
    • https://cdn.shopify.com/s/files/1/0429/6038/8252/files/31915502466.pdf
    • https://cdn.shopify.com/s/files/1/0438/4351/8629/files/50065927038.pdf
    • https://cdn.shopify.com/s/files/1/0437/4082/3706/files/5631883474.pdf
    • https://cdn.shopify.com/s/files/1/0432/7643/5621/files/tonareziteriseju.pdf
    • https://cdn.shopify.com/s/files/1/0429/6874/4099/files/c_est_parti_1.pdf
    • https://cdn.shopify.com/s/files/1/0428/0510/0707/files/41113304983.pdf
    • https://cdn.shopify.com/s/files/1/0436/9563/6633/files/47287752677.pdf
    • https://cdn.shopify.com/s/files/1/0434/5207/2088/files/javascript_if_then.pdf
    • https://cdn.shopify.com/s/files/1/0432/8731/4585/files/redemption_manual_5._0_book_3.pdf
    • https://cdn.shopify.com/s/files/1/0437/7985/0397/files/wapowegizegoxomemo.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_off0000482a.bin
254dc18b5a4ab08b9af1780a24232249f81988e2d6db041cb23b3353405075a8
pdf-font-stream PDF embedded font (sfnt) at offset 0x482A 5332 bytes
font_01_sfnt_off00005a35.bin
cbb5d0d8360344f7011a50fcd227969a5b31ae0d1565be964abfa2fa6c71b32f
pdf-font-stream PDF embedded font (sfnt) at offset 0x5A35 12928 bytes