Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ae03828829d62c1…

MALICIOUS

PDF

45.6 KB Created: 2020-08-08 08:11:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: dff64fe95d85fa1197b459426833ad7e SHA-1: cff3c8ba155c26988f575a02e92c164a8119808a SHA-256: 6ae03828829d62c1e877d39127590ee7ae338785fcd2dcb339169b39f9f00de1
162 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.ru, disguised as a legal form. The document body, though heavily obfuscated, contains references to this URL and other Shopify-hosted PDFs, suggesting a link farm or redirection scheme. The presence of a 'download button' heuristic further supports the lure aspect.

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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.ru/wb?keyword=annual%20return%20under%20factory%20act%201948%20form%2021%20pdf
    • http://files.tomwray.co.uk/uploads/1/3/1/4/131454523/7599449.pdf
    • http://files.my-early-morning-thoughts.com/uploads/1/3/0/7/130775795/bawaputowesowatu.pdf
    • http://files.jokittsyoga.com/uploads/1/3/1/4/131408353/c56096bf3.pdf
    • http://files.livingyourbestidlife.com/uploads/1/3/2/7/132710780/burevojotovofiwofu.pdf
    • http://files.carolinerosenblum.net/uploads/1/3/2/6/132682974/bb91034cb84d6.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/2358/8773/files/26082709959.pdf
    • https://cdn.shopify.com/s/files/1/0431/8697/8984/files/jedebokotaxawugelezuwi.pdf
    • https://cdn.shopify.com/s/files/1/0431/1715/0357/files/kewikegotisoxatidi.pdf
    • https://cdn.shopify.com/s/files/1/0428/8492/3555/files/17673115286.pdf
    • https://cdn.shopify.com/s/files/1/0430/4044/0471/files/65659040617.pdf
    • https://cdn.shopify.com/s/files/1/0433/6071/4904/files/92767811504.pdf
    • https://cdn.shopify.com/s/files/1/0434/0088/8469/files/legeliforudowolebumokuse.pdf
    • https://cdn.shopify.com/s/files/1/0429/1110/5191/files/wejowugifoxid.pdf
    • https://cdn.shopify.com/s/files/1/0435/4375/6954/files/kifederodunarasebot.pdf
    • https://cdn.shopify.com/s/files/1/0432/9956/9829/files/dabikibizifiga.pdf
    • https://cdn.shopify.com/s/files/1/0434/2477/6354/files/2801228910.pdf
    • https://cdn.shopify.com/s/files/1/0435/0427/1524/files/84709324178.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_off00006718.bin
345d0d53917e2c08f91e6ed12a3e617eead9c8d986310c076b63f8c644ee3317		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6718 5836 bytes
font_01_sfnt_off00007aff.bin
78628f468b993445bb0e7bdb0eee2e84ac9b66cb16e4667eb24dca74dca3c7c4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7AFF 14804 bytes

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