Malicious PDF — malware analysis report

Static analysis result for SHA-256 1159928ed2b60eec…

MALICIOUS

PDF

40.6 KB Created: 2020-09-01 01:41:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 927a1119d2bd11f55489ea2bb1056ae5 SHA-1: 78aa83abbc813dcff7f851727b929a6d9bfc0863 SHA-256: 1159928ed2b60eeca3bc6b065ec441bdae81a29e6b55af1566aa3b381c9d4402
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a critical heuristic firing for linking to known malicious redirector infrastructure, specifically pointing to 'ttraff.com'. The document body, though heavily obfuscated, contains the same URL and text related to 'ndis restrictive practices reporting', suggesting a lure. The presence of numerous other Shopify links, while mostly benign, indicates a potential link farm strategy to obscure the malicious URL.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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=ndis+restrictive+practices+reporting
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/5434/2042/files/commercial_appeal_crossword_puzzles_answers.pdf
    • https://cdn.shopify.com/s/files/1/0430/0819/6767/files/pakib.pdf
    • https://cdn.shopify.com/s/files/1/0429/0953/2323/files/98345176571.pdf
    • https://cdn.shopify.com/s/files/1/0457/6087/2604/files/batman_arkham_origins_guide.pdf
    • https://cdn.shopify.com/s/files/1/0465/1106/3190/files/traduction_anglais_franais_en_ligne_gratuit.pdf
    • https://cdn.shopify.com/s/files/1/0438/9814/2875/files/beers_criteria_pocket_guide.pdf
    • https://cdn.shopify.com/s/files/1/0430/3382/1347/files/rukizo.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/38935964995.pdf
    • https://cdn.shopify.com/s/files/1/0437/6435/1130/files/english_accounting_dictionary.pdf
    • https://static.usrfiles.com/ugd/b8c837_fdac5216c419411fbf86e9ccc374eabb.pdf
    • https://static.usrfiles.com/ugd/61b8bf_21a6c70a072e4a5c90bbea5d6aaeec36.pdf
    • https://static.usrfiles.com/ugd/2274a7_83ec483d10374525b8843bc747567008.pdf
    • https://static.usrfiles.com/ugd/253000_f560919a0e8a492b968c4b85afdfab0a.pdf
    • https://static.usrfiles.com/ugd/735424_d05dd6ed483d426b96bba5197f498a4c.pdf
    • https://static.usrfiles.com/ugd/3aee12_1771090dffa247fb81726abf2f2f84cf.pdf
    • https://static.usrfiles.com/ugd/314c35_e7f65ebe0ada43f6ad206d839805abee.pdf
    • https://static.usrfiles.com/ugd/0df15e_1b5bf563d82246378493dcd62988e46c.pdf
    • https://static.usrfiles.com/ugd/b8c837_4122a60ba22740319772efdb9658b1f8.pdf
    • https://static.usrfiles.com/ugd/50de67_37d40923b4f5484ea361b3e7a735ad65.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_off00005f64.bin
46224c3a6cd5c38a4a4dfe0a244eeeaef5573a737d792c3a6746cf366926c794		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F64 5240 bytes
font_01_sfnt_off00007153.bin
e2201865bcc825deaf241fea93db5ad2e67f64c5ca44dfdc53b7b488669b407d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7153 10628 bytes

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