Malicious PDF — malware analysis report

Static analysis result for SHA-256 4928bbdb8f754d8b…

MALICIOUS

PDF

172.1 KB Created: 2020-08-13 23:55:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cf32e883286db3c0ac96606c8a310b6a SHA-1: 52a524249d0e62640bc26e12c776c567300aaef8 SHA-256: 4928bbdb8f754d8b5b5c3007274f120a8280ada72b9ba0295f5cdc91de896443
92 Risk Score

Malware Insights

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

The PDF file contains a link to a known malicious redirector, ttraff.ru, which is presented as a search result for 'Bhagavad gita pdf in english'. This indicates a phishing or social engineering attempt to lure the user to a malicious site. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 3

  • 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.
  • 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.ru/pify?keyword=bhagavad+gita+pdf++in+english
    • http://files.fragments-of-time.com/uploads/1/3/2/6/132695629/3916375.pdf
    • http://pudumewid.sagemitigation.com/uploads/1/3/0/8/130873851/ziwolafapazarakaxu.pdf
    • http://files.youngchaelee.com/uploads/1/3/0/8/130813357/5563595.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/tipibag.pdf
    • https://cdn.shopify.com/s/files/1/0431/1659/3312/files/nipuzifijujaso.pdf
    • https://cdn.shopify.com/s/files/1/0428/9419/6902/files/bafg_antrag_formblatt_3.pdf
    • https://cdn.shopify.com/s/files/1/0432/2469/4939/files/xesimewalut.pdf
    • https://cdn.shopify.com/s/files/1/0430/7252/0352/files/wozerozem.pdf
    • https://cdn.shopify.com/s/files/1/0432/5644/7136/files/negative_impact_of_globalization_in_ethiopia.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/75901524911.pdf
    • https://cdn.shopify.com/s/files/1/0428/5346/6271/files/amar_ujala_full_news_paper.pdf
    • https://cdn.shopify.com/s/files/1/0432/0244/5475/files/google_docs_to_iphone.pdf
    • https://cdn.shopify.com/s/files/1/0432/3367/3380/files/33949703953.pdf
    • https://cdn.shopify.com/s/files/1/0427/8976/5279/files/26782780868.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0002442a.bin
d1b6b7719003e6e0907aff25590651d895eb208ea7c7e8ffdb75332ac342b70e
pdf-font-stream PDF embedded font (sfnt) at offset 0x2442A 5316 bytes
font_01_sfnt_off00025649.bin
6ce3ed3d0cf168fbf74d6eb321148d5efc31cda11559831b77020f7d4c9f4c8c
pdf-font-stream PDF embedded font (sfnt) at offset 0x25649 3740 bytes
font_02_sfnt_off000261c4.bin
051da52617ceb362c223be44ddba3e5d8d231fd2429ac5b1643672a337b614ed
pdf-font-stream PDF embedded font (sfnt) at offset 0x261C4 12928 bytes
font_03_sfnt_off00028a77.bin
701722ebae107d9a91621069a95803084d6bd0edf0251e058be1ecf13e24ab9f
pdf-font-stream PDF embedded font (sfnt) at offset 0x28A77 6672 bytes