Malicious PDF — malware analysis report

Static analysis result for SHA-256 0afe0981ed0393cd…

MALICIOUS

PDF

41.7 KB Created: 2020-08-31 06:21:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c9c1b1cb7f556ff27a22f527ffe2fe61 SHA-1: 1abe7ae68e4d4fddbe4a8fa6a62aca06810bded8 SHA-256: 0afe0981ed0393cdadeef339f7fade122c3d4d1f056c52fe6958c314fb6d6814
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a link to a known malicious redirector, ttraff.com, which is part of an advance-fee scam. The document body, though heavily obfuscated, contains text related to online video converters and a URL that appears to be part of a link farm designed to distribute malicious PDFs. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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/wix?keyword=online+video+converter++hd
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/10e3af_a1773b22fb0b409790882a73a42c2d74.pdf
    • https://static.usrfiles.com/ugd/affb4a_8c0fd7899fb147a2b681c1a5936c3188.pdf
    • https://static.usrfiles.com/ugd/b8c837_650183f1d51f413196dcc08892f593b3.pdf
    • https://static.usrfiles.com/ugd/764aaa_d718ad30ee2f4572a1c27ac1182fcaba.pdf
    • https://static.usrfiles.com/ugd/c618e9_61bfa46f19d64f9cb550829b69453cc5.pdf
    • https://static.usrfiles.com/ugd/2c608b_6ce2b8a75fbc49cc8606ba1816119452.pdf
    • https://static.usrfiles.com/ugd/b8c837_cfe2ad1adfcd4f928cdced644920cae8.pdf
    • https://static.usrfiles.com/ugd/b8c837_362ce055998348668a5072dc3eb203d9.pdf
    • https://static.usrfiles.com/ugd/a382ee_2736ea7042d743018d15d045a08d333a.pdf
    • https://static.usrfiles.com/ugd/d775a9_e9fd05c719424219a3b4c7ca001262db.pdf
    • https://cdn.shopify.com/s/files/1/0430/8772/4704/files/zugijumobomejupunefuxit.pdf
    • https://cdn.shopify.com/s/files/1/0434/7723/7920/files/bhakti_yoga_download.pdf
    • https://cdn.shopify.com/s/files/1/0430/5816/7959/files/vatizuvuw.pdf
    • https://cdn.shopify.com/s/files/1/0437/3846/4405/files/lox_new_album_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0432/4694/4416/files/zuzurepipa.pdf
    • https://cdn.shopify.com/s/files/1/0432/6513/0658/files/bapetejonibigak.pdf
    • https://cdn.shopify.com/s/files/1/0431/8402/9854/files/89326724386.pdf
    • https://cdn.shopify.com/s/files/1/0448/1007/6321/files/altruism_research.pdf
    • https://cdn.shopify.com/s/files/1/0432/9521/1680/files/36170546771.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000666d.bin
df29df12c8a3a24fb2a34907663cfb7cddd2987e4edd46af243568506244ef13		 pdf-font-stream PDF embedded font (sfnt) at offset 0x666D 4728 bytes
font_01_sfnt_off00007679.bin
b49d5ec82ea2c7cf41406311cda22aefe75419afa98b11478f370c277e3df369		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7679 10376 bytes

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