Malicious PDF — malware analysis report

Static analysis result for SHA-256 e52bac4ad1405824…

MALICIOUS

PDF

55.1 KB Created: 2020-08-19 12:55:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5444393adf46ef523050b49796dbf2d1 SHA-1: a13aeea98e9e46f3c7fb72da49c6f947e47a4329 SHA-256: e52bac4ad140582407b7afad28b1e9d5f2e759e29e8d82670b9370ecd84642e8
120 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, with a critical heuristic firing indicating a malicious redirector. The primary redirector URL is https://ttraff.com/pify?keyword=amsden+formation+wyoming. Another heuristic identified a large PDF link farm, with the first URL being https://cdn.shopify.com/s/files/1/0427/8406/3654/files/madexojemegixunil.pdf. The document body contains garbled text but also includes the primary redirector URL and several shopify URLs, suggesting a content-generation or spamming operation.

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=amsden+formation+wyoming
    • http://files.sanclementecarpetclean.com/uploads/1/3/1/3/131378771/wevumijajudix_peviguw_nanoxixobatinav_xefume.pdf
    • http://files.sftint.com/uploads/1/3/2/3/132303270/lazoniludex_duguxumigafoxaj.pdf
    • http://files.vardismarinakis.com/uploads/1/3/0/7/130775387/funagutadakuxujoj.pdf
    • http://gamofi.josefjakobs.com/uploads/1/3/2/6/132681947/volibufojeg.pdf
    • http://files.hbcualumnicle.com/uploads/1/3/1/3/131379296/pisusi.pdf
    • https://cdn.shopify.com/s/files/1/0427/8406/3654/files/madexojemegixunil.pdf
    • https://cdn.shopify.com/s/files/1/0433/7047/9766/files/tamovufugovawidagujerep.pdf
    • https://cdn.shopify.com/s/files/1/0433/5956/8027/files/76013979245.pdf
    • https://cdn.shopify.com/s/files/1/0433/9505/5777/files/josie_maran_craigslist.pdf
    • https://cdn.shopify.com/s/files/1/0440/3822/6085/files/usps_state_abreviations.pdf
    • https://cdn.shopify.com/s/files/1/0432/9072/2469/files/luxutisifudelafimokeruduf.pdf
    • https://cdn.shopify.com/s/files/1/0431/8773/2644/files/melugevosemato.pdf
    • https://cdn.shopify.com/s/files/1/0435/6128/7839/files/71139359881.pdf
    • https://cdn.shopify.com/s/files/1/0434/5302/2369/files/hammer_and_sickle_text.pdf
    • https://cdn.shopify.com/s/files/1/0430/2100/9053/files/pseudomonas_aeruginosa_morphology.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_off000099e3.bin
29a54d54094ca51f24235827dd6dbeb2d7d421dce42ac082112ba943173cf9d3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x99E3 5376 bytes
font_01_sfnt_off0000ac2a.bin
c86123e27df089db20a5c79f39ce0664e40784e5b18c4c105b27f58678b5200e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAC2A 10236 bytes

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