Malicious PDF — malware analysis report

Static analysis result for SHA-256 a9231e5481697ccf…

MALICIOUS

PDF

42.3 KB Created: 2020-08-08 17:33:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4a3f469315bfebaa6aef17f2fa94f3f5 SHA-1: 126b922088110568822a5a61b9d05839b31c3163 SHA-256: a9231e5481697ccfdd37fe26edfd1b68c51e128f3f1f0a3df7fbc7b1e36e9809
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a heuristic firing for a malicious redirector link, specifically `https://ttraff.com/pify?keyword=furniture+assembly+instructions+pdf`. This indicates the document is designed to trick users into visiting a malicious site by masquerading as assembly instructions. The presence of numerous other PDF links, many hosted on Shopify, suggests a link farm or SEO poisoning tactic to increase visibility. No scripts were extracted, but the primary attack vector appears to be social engineering via a deceptive link.

Heuristics 3

  • 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.
  • 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=furniture+assembly+instructions+pdf
    • http://mabuparam.thedanceacademymi.com/uploads/1/3/0/7/130776177/5104345.pdf
    • http://files.madisonfirstchurchofgod.com/uploads/1/3/0/8/130874134/notiruvok.pdf
    • http://files.swissamericanmonks.org/uploads/1/3/2/7/132740564/kiradotoresaxukuno.pdf
    • http://files.crashgem.com/uploads/1/3/1/3/131381078/4f1135dfb404b35.pdf
    • http://files.cinnamongirlpurebotanicals.com/uploads/1/3/1/1/131164520/3411592.pdf
    • https://cdn.shopify.com/s/files/1/0438/1668/1629/files/daily_devotional_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0433/8532/3683/files/25720167344.pdf
    • https://cdn.shopify.com/s/files/1/0435/3120/6808/files/vefodixivudakafenozezam.pdf
    • https://cdn.shopify.com/s/files/1/0428/8613/5961/files/vetujutivupuzoborefu.pdf
    • https://cdn.shopify.com/s/files/1/0430/9486/8122/files/68552522006.pdf
    • https://cdn.shopify.com/s/files/1/0438/4777/8469/files/livre_alphabet_arabe.pdf
    • https://cdn.shopify.com/s/files/1/0432/4248/7963/files/ultimo_edital_da_prf.pdf
    • https://cdn.shopify.com/s/files/1/0432/0047/9391/files/kewexuve.pdf
    • https://cdn.shopify.com/s/files/1/0430/2739/8807/files/18734190679.pdf
    • https://cdn.shopify.com/s/files/1/0427/6197/8023/files/buvodopozuko.pdf
    • https://cdn.shopify.com/s/files/1/0440/0958/6846/files/ludexobulofofofa.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/16711599054.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/44994208471.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000677e.bin
c748e2af4b93b01f065cd44e67aeb632b11dd8335ca6e474104cb28b2ea7a28a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x677E 5496 bytes
font_01_sfnt_off00007a1b.bin
757939cd90bef0a70362dbe0160d728f8e631f28ee8643911ae44b613a80e743		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A1B 10008 bytes

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