Malicious PDF — malware analysis report

Static analysis result for SHA-256 0aa68d755454b1c6…

MALICIOUS

PDF

42.2 KB Created: 2020-08-30 03:56:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 22043f9ed13dbde9f534d672271928b5 SHA-1: 10e5d34873b2ee3cf2be85dad476fd9e540df9fe SHA-256: 0aa68d755454b1c66ae58741bfe5c9ea9ca4d3473473900b4b3a07e535e39c1d
194 Risk Score

Malware Insights

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

The PDF contains a lure related to 'film genres list pdf' which, upon inspection, redirects to a known malicious URL. This indicates an attempt to trick the user into visiting a malicious site, likely for phishing or malware distribution. The presence of numerous external PDF links, some pointing to potentially benign content and others to a malicious redirector, suggests a link farm or SEO poisoning tactic to attract victims. The ML classifier also strongly flagged this PDF as malicious.

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.ru/wix?keyword=film+genres+list+pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/d2751c_438fe15afe6c4fbeb93b2cd23be6c07a.pdf
    • https://static.usrfiles.com/ugd/b8c837_6f15608759e54404a0a0ecd47c394b6b.pdf
    • https://static.usrfiles.com/ugd/1cfe37_d7bb13d982274657a0edd41e90c0b20a.pdf
    • https://static.usrfiles.com/ugd/b8c837_e7273b7c71ec4c0b95ebea59f1d08325.pdf
    • https://static.usrfiles.com/ugd/b8c837_40e857416bb2443d99783f60dfa5c845.pdf
    • https://cdn.shopify.com/s/files/1/0437/8230/8002/files/rocksmith_2014_cherub_rock_dlc.pdf
    • https://cdn.shopify.com/s/files/1/0427/4782/2236/files/18956579815.pdf
    • https://cdn.shopify.com/s/files/1/0434/3480/3352/files/39608142086.pdf
    • https://cdn.shopify.com/s/files/1/0440/4133/9030/files/xbox_360_minecraft_mods_download.pdf
    • https://cdn.shopify.com/s/files/1/0432/8367/7339/files/31902192125.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_off000067a8.bin
3c71dad10457656db6b6d1e2ddcd1dcf1fdbdf2facd5d9916f390cf4ef87b64e
pdf-font-stream PDF embedded font (sfnt) at offset 0x67A8 5108 bytes
font_01_sfnt_off000078ec.bin
150091c1a24018a7914f8e4e617baf9a8992b2062f2dc49bc1cd9471638fbf03
pdf-font-stream PDF embedded font (sfnt) at offset 0x78EC 10392 bytes