Malicious PDF — malware analysis report

Static analysis result for SHA-256 a2364ab0ebf377a0…

MALICIOUS

PDF

41.4 KB Created: 2020-08-22 02:30:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 839f631e4b5b52f2a667184c53efe91c SHA-1: 670e3cc323246bebf4f8f0f781e476594fd182ec SHA-256: a2364ab0ebf377a091cab875ab0a3508ecbc858ff888f1907879920da5663a0b
120 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/pify?keyword=my+bedroom+vocabulary+worksheets'. This URL is presented within the document body, suggesting a social engineering lure. The presence of a PDF link farm heuristic further indicates a pattern of distributing malicious links. The document's content, though heavily obfuscated, appears to contain the malicious URL and several other URLs, some of which are hosted on Shopify but others are on unknown domains.

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=my+bedroom+vocabulary+worksheets
    • http://lowitoj.naturalmedicineinc.net/uploads/1/3/2/6/132695990/928b5a171.pdf
    • http://files.nanpokerwinski.com/uploads/1/3/1/4/131452826/1035552.pdf
    • https://cdn.shopify.com/s/files/1/0431/3179/7668/files/40480860414.pdf
    • https://cdn.shopify.com/s/files/1/0431/7056/2209/files/44807443891.pdf
    • https://cdn.shopify.com/s/files/1/0437/5448/7957/files/asian_organized_crime.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/kubogofire.pdf
    • https://cdn.shopify.com/s/files/1/0438/4853/2128/files/64574887104.pdf
    • https://cdn.shopify.com/s/files/1/0433/7192/1571/files/sawalokowitoziri.pdf
    • https://cdn.shopify.com/s/files/1/0431/3609/0267/files/79390875336.pdf
    • https://cdn.shopify.com/s/files/1/0435/9972/4702/files/73453636005.pdf
    • https://cdn.shopify.com/s/files/1/0430/8297/3346/files/88473098464.pdf
    • https://cdn.shopify.com/s/files/1/0430/9726/0192/files/62499934983.pdf
    • https://cdn.shopify.com/s/files/1/0431/3497/6157/files/wurivuvizipisorali.pdf
    • https://cdn.shopify.com/s/files/1/0430/9050/9975/files/lezikenaxewolaze.pdf
    • https://cdn.shopify.com/s/files/1/0427/4746/1788/files/disodium_edta_safety_data_sheet.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_off00005b01.bin
d823ba175c854ee51e1e80658f0fe73fe050e7bf4023fb2d10ffa667c8c38633		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5B01 5640 bytes
font_01_sfnt_off00006e20.bin
78370aec7a23ac97d1e8f4fb7a77bf5b575e277f9c5f75a952860cac04355e76		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E20 13496 bytes

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