Malicious PDF — malware analysis report

Static analysis result for SHA-256 d789dfdc3277a082…

MALICIOUS

PDF

41.1 KB Created: 2020-08-21 10:52:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 18d43be4cd365e39004f3f77bdb1c7ac SHA-1: 5158ae1dd723d7b46e32021fdc5c4887b5719ae1 SHA-256: d789dfdc3277a0829201ef7eda3a211688ac379b140488066a468298d1cd72e1
152 Risk Score

Malware Insights

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

The PDF contains a link that redirects to a known malicious domain, likely as part of a phishing or scam campaign. The document body, though heavily obfuscated, contains references to 'Los Angeles Times crossword answers' and the malicious URL, suggesting a lure to trick users into clicking. The presence of numerous external PDF links further indicates a link farm or redirection strategy.

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=los+angeles+times+crossword+answers
    • http://files.alissahartenbaum.com/uploads/1/3/1/4/131482916/satogemimuxu_gubakumozeb.pdf
    • https://cdn.shopify.com/s/files/1/0429/8027/8426/files/tawet.pdf
    • https://cdn.shopify.com/s/files/1/0438/6878/2757/files/66369964886.pdf
    • https://cdn.shopify.com/s/files/1/0434/5177/7185/files/nibyo_by_charly_na_nina_video.pdf
    • https://cdn.shopify.com/s/files/1/0437/7221/5448/files/tutiwosazekivipimuzudumev.pdf
    • https://cdn.shopify.com/s/files/1/0430/8864/2197/files/togupuzofupalo.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/dijovosulodomozov.pdf
    • https://cdn.shopify.com/s/files/1/0432/6863/6834/files/gusuguvale.pdf
    • https://cdn.shopify.com/s/files/1/0432/5461/2123/files/34263455671.pdf
    • https://cdn.shopify.com/s/files/1/0430/0737/7567/files/binary_number_division.pdf
    • https://cdn.shopify.com/s/files/1/0430/6187/0741/files/xapire.pdf
    • https://cdn.shopify.com/s/files/1/0435/7970/3451/files/escape_room_game_level_38_answer.pdf
    • https://cdn.shopify.com/s/files/1/0438/2995/2674/files/60085777193.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_off00006242.bin
1b71abb3ca14f9e1a4cf46db8baf7399bc3dcb2f82fb4221596a95a19d34e9cf
pdf-font-stream PDF embedded font (sfnt) at offset 0x6242 5292 bytes
font_01_sfnt_off0000743a.bin
2eee2d6f66e34213847d864442a37ef9560944e7496f98960686fc22dcb82e1f
pdf-font-stream PDF embedded font (sfnt) at offset 0x743A 10296 bytes