Malicious PDF — malware analysis report

Static analysis result for SHA-256 b05a05413e97bc1a…

MALICIOUS

PDF

34.0 KB Created: 2020-08-23 12:41:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0f18140fe67144b05473b7de981d0853 SHA-1: 4932e1466c94a5aa9ff629d0d9b8a3ebf91289b1 SHA-256: b05a05413e97bc1a6533e5afad93f91e0e7ea24f900182086b9ddbf34235a925
152 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, with a critical heuristic firing indicating a link to known malicious redirector infrastructure. The ML classifier also flagged the PDF as malicious. The document body, though heavily obfuscated, contains the URL 'https://ttraff.cc/pify?keyword=bandook+wali+games', which is also present in the heuristics. This suggests the document is designed to lure users to malicious sites, potentially for further exploitation or malware delivery.

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.cc/pify?keyword=bandook+wali+games
    • http://pedomefi.redlineinstallers.com/uploads/1/3/2/6/132680981/jojufunijovowewobu.pdf
    • http://files.kawarthafootclinic.com/uploads/1/3/1/4/131409526/5583113.pdf
    • http://files.sarahjayandcompany.com/uploads/1/3/0/9/130969950/d76747d411.pdf
    • http://files.acewalkerart.com/uploads/1/3/0/8/130813042/9691047.pdf
    • https://cdn.shopify.com/s/files/1/0432/7024/2460/files/zonebi.pdf
    • https://cdn.shopify.com/s/files/1/0432/7669/7760/files/complete_estimation_and_costing_of_residential_building.pdf
    • https://cdn.shopify.com/s/files/1/0437/5855/1189/files/wopifopeduxev.pdf
    • https://cdn.shopify.com/s/files/1/0432/5467/7662/files/vesedonukexuja.pdf
    • https://cdn.shopify.com/s/files/1/0429/7133/2767/files/gibson_les_paul_setup_guide.pdf
    • https://cdn.shopify.com/s/files/1/0434/9699/7030/files/vijotinad.pdf
    • https://cdn.shopify.com/s/files/1/0429/1392/3228/files/dakitirurowekeka.pdf
    • https://cdn.shopify.com/s/files/1/0439/9860/9566/files/tchibo_cafissimo_compact_instrukcja.pdf
    • https://cdn.shopify.com/s/files/1/0432/6280/4136/files/tifunuzaxos.pdf
    • https://cdn.shopify.com/s/files/1/0430/3205/1873/files/14397043751.pdf
    • https://cdn.shopify.com/s/files/1/0430/8631/5682/files/69862428961.pdf
    • https://cdn.shopify.com/s/files/1/0431/9775/9643/files/5787218168.pdf
    • https://cdn.shopify.com/s/files/1/0432/9042/7552/files/dafubazisazokob.pdf
    • https://cdn.shopify.com/s/files/1/0431/3225/6422/files/gana_achu_sorry_sorry_video_song.pdf
    • https://cdn.shopify.com/s/files/1/0431/6630/2376/files/jaligelivumugab.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_off000048c0.bin
4cddfc95cfc834dc223bfd5883bb4f89f8b7c252376d90bbb06511b42207af9d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x48C0 5256 bytes
font_01_sfnt_off00005aa4.bin
a5e90f6165521813c96bab3ad019599ad2ed87bd538db0dc86af8e03e52c42d7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5AA4 9568 bytes

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