Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e237e6cc5b8ee48…

MALICIOUS

PDF

40.9 KB Created: 2020-08-09 23:19:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8494c4fcb54494ce78ef913fc309024c SHA-1: 7ba33859153a1e9b8a399b8c527893327474fc75 SHA-256: 6e237e6cc5b8ee4850fee7e33eb6ff70f5edb889ec69f63fb7db134344d1077c
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a link farm hosted on Shopify. The primary malicious link, https://ttraff.com/pify?keyword=destination+b2+pdf+download, is identified as a redirector to malicious infrastructure. The ML classifier strongly indicates maliciousness, and the document body's text suggests a lure for "Destination b2 pdf download". No scripts were extracted, but the presence of numerous external links indicates a likely attempt to redirect the user to malicious content.

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=destination+b2+pdf+download
    • http://files.georgetownslrl.com/uploads/1/3/1/0/131070051/282a4d.pdf
    • http://files.paulinakalwarska.com/uploads/1/3/1/8/131856330/60419a8.pdf
    • http://files.tinagutierrezartsphotography.com/uploads/1/3/0/7/130775383/remax-taxopugazaledu-fuluxibejurifuj-lavosiraleset.pdf
    • http://files.iamwowblingonabudget.com/uploads/1/3/1/3/131380045/871808.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/20424522606.pdf
    • https://cdn.shopify.com/s/files/1/0429/3741/7891/files/59376069016.pdf
    • https://cdn.shopify.com/s/files/1/0432/3442/7047/files/gupunepibulumebiwudukaba.pdf
    • https://cdn.shopify.com/s/files/1/0432/7417/4632/files/nicomachean_ethics_sparknotes.pdf
    • https://cdn.shopify.com/s/files/1/0433/4449/4750/files/94324607142.pdf
    • https://cdn.shopify.com/s/files/1/0433/9931/5610/files/nebuweno.pdf
    • https://cdn.shopify.com/s/files/1/0432/7899/1518/files/55892875533.pdf
    • https://cdn.shopify.com/s/files/1/0436/2895/3763/files/nj_st_5_form.pdf
    • https://cdn.shopify.com/s/files/1/0431/5283/4711/files/sda_hymnal_book.pdf
    • https://cdn.shopify.com/s/files/1/0428/3141/3404/files/bovizunuxepikimokuk.pdf
    • https://cdn.shopify.com/s/files/1/0432/2004/1886/files/wenedopigu.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_off0000607f.bin
782663e7ad36270afdfd040df1de884c90fb1865fb9c80f2d6af3acfda6b3539		 pdf-font-stream PDF embedded font (sfnt) at offset 0x607F 5300 bytes
font_01_sfnt_off000072b5.bin
ce65722da2781560ef7f853118ed2ebf2258e4ec387f495677c2534cd29c5440		 pdf-font-stream PDF embedded font (sfnt) at offset 0x72B5 11004 bytes

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