Malicious PDF — malware analysis report

Static analysis result for SHA-256 a46943ab389eebe3…

MALICIOUS

PDF

90.6 KB Created: 2020-08-10 22:27:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2837e20d317c464485170acc4810871f SHA-1: d1b814e6f972e1d0aa62202f32ef5cf0dc88d6b3 SHA-256: a46943ab389eebe33a45a4f9f99490e785a2132cc25d1f61f4dadc73dfaef9fe
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'ttraff.com'. The document body, though heavily obfuscated, includes the same URL, suggesting it's the primary lure. The ML classifier also strongly flagged this PDF as malicious. The presence of a link farm heuristic further indicates malicious intent, likely for SEO poisoning or traffic generation.

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/pify?keyword=report+on+abrasive+water+jet+machining+pdf
    • http://files.rdsfinancialservices.com/uploads/1/3/0/7/130775649/4868576.pdf
    • http://files.mmoranokjelle.com/uploads/1/3/2/3/132303351/zesorufuwazozago.pdf
    • http://files.karenstobbe.com/uploads/1/3/1/6/131606349/niwafonejupara.pdf
    • http://files.hordlevoluntarycare.org/uploads/1/3/0/8/130874413/zoladamalija.pdf
    • https://cdn.shopify.com/s/files/1/0433/3436/9438/files/12719521254.pdf
    • https://cdn.shopify.com/s/files/1/0427/9504/0924/files/zowuzatijetuvamugotiputu.pdf
    • https://cdn.shopify.com/s/files/1/0431/1141/5959/files/a3_problem_solving_template.pdf
    • https://cdn.shopify.com/s/files/1/0434/2156/5078/files/gubirufi.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/zisavugeti.pdf
    • https://cdn.shopify.com/s/files/1/0431/0938/4345/files/vedajonej.pdf
    • https://cdn.shopify.com/s/files/1/0437/0097/7816/files/4003863156.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/niroduwo.pdf
    • https://cdn.shopify.com/s/files/1/0431/4529/8077/files/62604635625.pdf
    • https://cdn.shopify.com/s/files/1/0428/5785/7187/files/megotugiwawaxisi.pdf
    • https://cdn.shopify.com/s/files/1/0435/4444/5092/files/75908756866.pdf
    • https://cdn.shopify.com/s/files/1/0430/4309/4677/files/agential_realism_barad.pdf
    • https://cdn.shopify.com/s/files/1/0437/9728/2977/files/poxiwokubi.pdf
    • https://cdn.shopify.com/s/files/1/0433/2699/6633/files/90215148671.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_off000125ba.bin
8a9c8ef18a27ff6ca52067f3cedd565f624016ec114a6e5344ab7700351bba24		 pdf-font-stream PDF embedded font (sfnt) at offset 0x125BA 5912 bytes
font_01_sfnt_off000139c4.bin
6369f692c89f84a29acc14ac6ee32bb957f6a192fab49330eb11f3dcb00fa747		 pdf-font-stream PDF embedded font (sfnt) at offset 0x139C4 10292 bytes

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