Malicious PDF — malware analysis report

Static analysis result for SHA-256 78914a67c0c3e49f…

MALICIOUS

PDF

45.4 KB Created: 2020-08-12 02:48:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2f7ea97501ea66ee5d6746915e044b56 SHA-1: 75f725c8ce6ee210fe78dcd9e542f8fbe92baa86 SHA-256: 78914a67c0c3e49fd42df0faa7258fdf0aa46e1f918647b8cfbd9c0cdca40f9d
152 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'. Additionally, it features a PDF link farm with numerous Shopify-hosted links, suggesting an attempt to generate traffic or distribute content through compromised platforms. The ML classifier also strongly indicated maliciousness. The embedded URL in the document body, 'https://ttraff.com/pify?keyword=canales+de+comunicacion+pdf', is the primary indicator of malicious intent, likely serving as a lure or redirect to a malicious site.

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=canales+de+comunicacion+pdf
    • http://sepaxi.justneighborsvt.org/uploads/1/3/1/3/131382406/ccbc652941.pdf
    • http://files.twistedtangerine.com/uploads/1/3/2/6/132682295/a23c91fe5c23.pdf
    • http://files.sonialopezcoaching.com/uploads/1/3/0/7/130738984/xowixevepi.pdf
    • https://cdn.shopify.com/s/files/1/0431/8072/0294/files/nomibenunasuxonikejez.pdf
    • https://cdn.shopify.com/s/files/1/0431/1551/1968/files/sewabim.pdf
    • https://cdn.shopify.com/s/files/1/0431/5221/2130/files/storm_brigid_kemmerer_espaol.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/salelixakibikiziz.pdf
    • https://cdn.shopify.com/s/files/1/0432/6978/3720/files/69420566856.pdf
    • https://cdn.shopify.com/s/files/1/0431/3448/4648/files/bronkopneumonia_idai.pdf
    • https://cdn.shopify.com/s/files/1/0438/1402/7421/files/48471373930.pdf
    • https://cdn.shopify.com/s/files/1/0431/9612/1248/files/purchasing_and_supply_chain_management_notes.pdf
    • https://cdn.shopify.com/s/files/1/0432/7460/0598/files/70066666420.pdf
    • https://cdn.shopify.com/s/files/1/0431/6450/0122/files/servsafe_manager_study_guide_2016.pdf
    • https://cdn.shopify.com/s/files/1/0438/2277/6480/files/sorumuwowaw.pdf
    • https://cdn.shopify.com/s/files/1/0434/8752/7078/files/nexanovilamazowegagevidu.pdf
    • https://cdn.shopify.com/s/files/1/0434/0459/1271/files/36905300846.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_off0000724c.bin
76760f7888d585687fae9b8d47edd8e867fc96143add2304ce0b95142332d20e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x724C 5108 bytes
font_01_sfnt_off0000839b.bin
88ee5bc43da3a0a6b587e1270365b13d6175988b42848aa01268c949d462e527		 pdf-font-stream PDF embedded font (sfnt) at offset 0x839B 10960 bytes

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