Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ebfea2fcb4631ea…

MALICIOUS

PDF

50.5 KB Created: 2020-08-03 20:03:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 39c6c6d684d2cb7ae278d5b5b14db70e SHA-1: 75e5f9be671e58b29a82e158dd5771bb917363cc SHA-256: 3ebfea2fcb4631ea0b2aa5818201c6de1e3e0f1341c1b55de7323673d5e90dc9
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a link to a known malicious redirector, ttraff.com, which is disguised with a keyword related to creating PDF bookmarks. The document also hosts a large number of external PDF links, many pointing to Shopify domains, suggesting a link farm or SEO poisoning tactic. The ML classifier strongly indicated maliciousness, and the presence of embedded URLs further supports the malicious intent.

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=cara+membuat+bookmark+pdf+dengan+adobe+reader+9
    • http://files.trinityhouseentertainmentinc.com/uploads/1/3/1/6/131606550/8581045.pdf
    • http://files.rautoulab.com/uploads/1/3/2/8/132815015/320765.pdf
    • http://files.drcrivello.com/uploads/1/3/0/8/130813696/wofexukidemoru.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/nelafujadodejofit.pdf
    • https://cdn.shopify.com/s/files/1/0432/6886/6212/files/kikowenuxikonuzuzipenakab.pdf
    • https://cdn.shopify.com/s/files/1/0432/3731/0632/files/tebojetawofiloponegufoj.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/banen.pdf
    • https://cdn.shopify.com/s/files/1/0430/1104/7575/files/81993382623.pdf
    • https://cdn.shopify.com/s/files/1/0431/1249/7312/files/93843620554.pdf
    • https://cdn.shopify.com/s/files/1/0432/9209/8716/files/acams_study_guide.pdf
    • https://cdn.shopify.com/s/files/1/0434/1402/8444/files/84973971650.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/98973723668.pdf
    • https://cdn.shopify.com/s/files/1/0430/0744/3103/files/46974482643.pdf
    • https://cdn.shopify.com/s/files/1/0429/0733/6867/files/who_pays_for_the_rehearsal_dinner.pdf
    • https://cdn.shopify.com/s/files/1/0434/6891/4838/files/watokawamibanariru.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007294.bin
b0b796997f60b83f6e43ec8268b5e7914854e98006a4c795c56155a4a77c6397		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7294 5368 bytes
font_01_sfnt_off000084c2.bin
72f1063e0dd0c9bdd83ed90064e9c7a6008784e08829d0f7e7a8a0b6503ef3a9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x84C2 13084 bytes
font_02_sfnt_off0000aed0.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAED0 4324 bytes

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