Malicious PDF — malware analysis report

Static analysis result for SHA-256 8c083ace6d722383…

MALICIOUS

PDF

43.4 KB Created: 2020-08-02 13:28:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0f599688fc60d12755cb6893efe937f7 SHA-1: 64ee592f43be0945a4639c09bd04865d127842b4 SHA-256: 8c083ace6d722383352ff78a248b5eb88695970da534bc46f23811dbfa36c7dc
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF document exhibits malicious characteristics, primarily through its inclusion of a critical redirector link to 'ttraff.com'. This URL, along with a large number of other embedded links pointing to Shopify domains, suggests a link farm designed to obscure the ultimate destination and potentially distribute malware or conduct phishing. The ML classifier also strongly flagged this PDF as malicious.

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=2009+ford+focus+repair+manual+pdf
    • http://files.religiousdoodles.com/uploads/1/3/0/8/130815017/3cf85bf08e6b1f8.pdf
    • http://files.hoaconstruction-services.com/uploads/1/3/1/4/131438177/vimufarepasuka.pdf
    • http://files.planartsnetwork.org/uploads/1/3/0/9/130969220/mulut_mudopemevofiw_wofesi_duvapoxat.pdf
    • http://files.bronxpartyhall.com/uploads/1/3/1/3/131379306/mofiriwoxema.pdf
    • https://cdn.shopify.com/s/files/1/0431/5211/3820/files/37855950854.pdf
    • https://cdn.shopify.com/s/files/1/0429/6874/4087/files/91698878336.pdf
    • https://cdn.shopify.com/s/files/1/0437/2607/8101/files/55540680248.pdf
    • https://cdn.shopify.com/s/files/1/0430/7265/1413/files/wewoxesokobilipalisej.pdf
    • https://cdn.shopify.com/s/files/1/0428/9373/8143/files/kutegitulumamegoduviv.pdf
    • https://cdn.shopify.com/s/files/1/0437/0323/8811/files/vavafafakanaze.pdf
    • https://cdn.shopify.com/s/files/1/0428/3714/7811/files/8565119511.pdf
    • https://cdn.shopify.com/s/files/1/0440/3478/5430/files/56039885360.pdf
    • https://cdn.shopify.com/s/files/1/0428/4334/0956/files/dalilota.pdf
    • https://cdn.shopify.com/s/files/1/0430/3293/6605/files/66636708012.pdf
    • https://cdn.shopify.com/s/files/1/0431/6728/5408/files/37930816324.pdf
    • https://cdn.shopify.com/s/files/1/0434/2507/1256/files/47461797690.pdf
    • https://cdn.shopify.com/s/files/1/0430/5967/5293/files/88969779520.pdf
    • https://cdn.shopify.com/s/files/1/0427/8494/8380/files/12094051606.pdf
    • https://cdn.shopify.com/s/files/1/0428/9141/1615/files/gotta_find_you_lyrics.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/
    • https://cdn.shopify.com/s/files/1/0428/9141/1615/files/gotta_find_you

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006a0e.bin
923c55c0bf3cd57828060b9af3118bdc380daf1bad4352a5309843191808332d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A0E 5636 bytes
font_01_sfnt_off00007d1c.bin
d10f2bbb40d205f89b26e14d11415415b7cc5babd48ce591eb04d94c50eee4d9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7D1C 10316 bytes

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