Malicious PDF — malware analysis report

Static analysis result for SHA-256 0334553ea31b4455…

MALICIOUS

PDF

64.6 KB Created: 2020-08-14 23:52:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a630ea95cf46254fc8fe90bea392028e SHA-1: 431ab072de043feac33353c176c28a9c14408192 SHA-256: 0334553ea31b4455fa1d4377d1183c177947802e51c14958fa3a739044845ce5
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/pify?keyword=rearrange+pages+in+pdf+adobe+reader+xi'. Additionally, a 'Browser extension / update installation lure' heuristic indicates social engineering to trick the user into installing potentially malicious software. The document body, though heavily obfuscated, contains the same URL, reinforcing the malicious intent.

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.
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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.cc/pify?keyword=rearrange+pages+in+pdf+adobe+reader+xi
    • http://files.theunhealthycarnivore.com/uploads/1/3/0/9/130970014/texafo-tojoliga-zizolu-saroluzerus.pdf
    • http://nerolom.reneezwang.com/uploads/1/3/0/7/130775740/8686893.pdf
    • http://files.ccsps.info/uploads/1/3/1/4/131407155/53248.pdf
    • http://files.hjbandboosters.com/uploads/1/3/0/7/130738889/fofunipabal.pdf
    • http://files.cbuproductions.com/uploads/1/3/1/3/131381428/vowixab-nadoli-xuxerimagesiro-mokabowame.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/5641/4363/files/fabufopu.pdf
    • https://cdn.shopify.com/s/files/1/0430/6308/3162/files/vunun.pdf
    • https://cdn.shopify.com/s/files/1/0449/9190/5956/files/osteoporosis_diagnosis.pdf
    • https://cdn.shopify.com/s/files/1/0430/1540/5725/files/nugujime.pdf
    • https://cdn.shopify.com/s/files/1/0430/0944/1953/files/52258358471.pdf
    • https://cdn.shopify.com/s/files/1/0434/3182/1473/files/45257788655.pdf
    • https://cdn.shopify.com/s/files/1/0434/2611/9847/files/dnd_4e_character_sheet.pdf
    • https://cdn.shopify.com/s/files/1/0435/7550/9155/files/nozivepupanireri.pdf
    • https://cdn.shopify.com/s/files/1/0432/3731/0632/files/assassins_creed_3_mods.pdf
    • https://cdn.shopify.com/s/files/1/0434/6734/1981/files/65062877343.pdf
    • https://cdn.shopify.com/s/files/1/0431/4405/2885/files/gta_sa_speedrun.pdf
    • https://cdn.shopify.com/s/files/1/0428/8449/7575/files/dojaxifosu.pdf
    • https://cdn.shopify.com/s/files/1/0429/2493/3283/files/41635154813.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_off0000be93.bin
54c1ab12415d54e872874b8c50ec23c3d7c7af7ec266f14658b64a390a839451		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBE93 5392 bytes
font_01_sfnt_off0000d0f3.bin
9decb991d6f3395d118125ec759dd013383ebf6e47bdfe7c4bd914abbfad51c0		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD0F3 10492 bytes

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