Malicious PDF — malware analysis report

Static analysis result for SHA-256 a400d9598a2fcbef…

MALICIOUS

PDF

42.9 KB Created: 2020-08-10 02:46:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b5db6877788ea36be13416be7af4f9b5 SHA-1: ae3fb206fcad7d88f667888a16ab4c874d22d1e4 SHA-256: a400d9598a2fcbef143ec89c31d21a427f8acb63d07c704e020bdf15ee164f8c
150 Risk Score

Malware Insights

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

The PDF document contains a large number of embedded links, including a critical link to a known malicious redirector at `https://ttraff.cc/pify?keyword=beverage+knowledge+pdf`. The document body suggests a lure related to "Beverage knowledge pdf", likely intended to entice users to click on the embedded links. The ML classifier strongly supports the malicious nature of this PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.cc/pify?keyword=beverage+knowledge+pdf
    • http://files.brasecollection.com.au/uploads/1/3/1/0/131070581/meligugi-mavajowixuzapo-putugujafi-zuxikijaxevedef.pdf
    • http://files.pridemarie.com/uploads/1/3/0/9/130969545/lisatu.pdf
    • http://files.alltechclimate.ca/uploads/1/3/1/8/131871994/3683960.pdf
    • http://files.thefilesartsproject.com/uploads/1/3/0/7/130775590/4e5116.pdf
    • https://cdn.shopify.com/s/files/1/0427/8799/5807/files/25667876057.pdf
    • https://cdn.shopify.com/s/files/1/0438/6455/5675/files/61674142346.pdf
    • https://cdn.shopify.com/s/files/1/0431/7541/1872/files/7901215407.pdf
    • https://cdn.shopify.com/s/files/1/0431/6341/8784/files/drag_racer_v3_cheats.pdf
    • https://cdn.shopify.com/s/files/1/0437/7670/4664/files/jspdf_autotable_header_height.pdf
    • https://cdn.shopify.com/s/files/1/0429/5000/0791/files/fikas.pdf
    • https://cdn.shopify.com/s/files/1/0439/0112/4760/files/2716945037.pdf
    • https://cdn.shopify.com/s/files/1/0438/1566/5826/files/givemalomatotilo.pdf
    • https://cdn.shopify.com/s/files/1/0427/6187/9719/files/conceptual_and_empirical_research.pdf
    • https://cdn.shopify.com/s/files/1/0429/9181/2767/files/38979912867.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/gipal.pdf
    • https://cdn.shopify.com/s/files/1/0432/2285/9944/files/xefofagilerenomarateto.pdf
    • https://cdn.shopify.com/s/files/1/0435/4641/1160/files/muwuzoxemejupuduzanosun.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_off00006a25.bin
7803145bbbc12ec6001fa1fbc8a645d802d747d4c0639a479c068d12b569fcb7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A25 5296 bytes
font_01_sfnt_off00007c5d.bin
ab43b5ccfe1969a8399a7e011339bc3b9f6f4311196f76cf3fa050b084d447da		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7C5D 10144 bytes

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