Malicious PDF — malware analysis report

Static analysis result for SHA-256 8932c69ad3d860cf…

MALICIOUS

PDF

42.4 KB Created: 2020-09-06 00:41:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e03b8580b6d19a7da85d4b7744c2d6b3 SHA-1: 7a4fbfaab92cd278f78034e42039fb52bb152817 SHA-256: 8932c69ad3d860cf0a64a235775b2b645e2e96e93f3bdb2908bc478f8a73876c
154 Risk Score

Malware Insights

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

This PDF file contains a link that redirects to a malicious domain, identified by the heuristic PDF_MALICIOUS_REDIRECTOR_LINK. The document body and embedded links suggest a lure related to car reviews, specifically for a '2012 Honda Pilot'. The presence of numerous external PDF links, as noted by PDF_SEO_LINK_FARM, indicates a link farm strategy. The ML classifier also strongly flagged this PDF as malicious.

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.club/pify?keyword=2012+honda+pilot+reviews+consumer+reports
    • https://cdn.shopify.com/s/files/1/0430/7877/9029/files/adobe_reader_app_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0463/8883/8555/files/bcbs_appeal_form_mn.pdf
    • https://cdn.shopify.com/s/files/1/0434/2336/7335/files/rakamejafutaxilitinati.pdf
    • https://cdn.shopify.com/s/files/1/0432/3688/4642/files/vujirubapedesejakezug.pdf
    • https://cdn.shopify.com/s/files/1/0435/6816/9121/files/54238510207.pdf
    • https://cdn.shopify.com/s/files/1/0436/4419/0880/files/cartoon_games_free_for_pc.pdf
    • https://cdn.shopify.com/s/files/1/0428/7663/3247/files/td_ameritrade_android_app.pdf
    • https://cdn.shopify.com/s/files/1/0431/5562/0006/files/72611645246.pdf
    • https://cdn.shopify.com/s/files/1/0434/1707/5868/files/sobaditezi.pdf
    • https://static.usrfiles.com/ugd/bc4951_2b311c4d8fde4846a83f97321bce33f7.pdf
    • https://static.usrfiles.com/ugd/ce5d00_ddfaad112b024325ac7b8eb3cd23d28d.pdf
    • https://cdn.shopify.com/s/files/1/0437/8787/8549/files/flip_tables_emoticon.pdf
    • https://cdn.shopify.com/s/files/1/0432/0044/6626/files/how_to_tame_a_wild_tongue_answers.pdf
    • https://cdn.shopify.com/s/files/1/0427/7056/3239/files/chlamydospore_formation_wikipedia.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_off0000662a.bin
4b05ad306f22ee20e6cd9b2f74645fae978ead49a22cbff7ffa1bd5b782112ae
pdf-font-stream PDF embedded font (sfnt) at offset 0x662A 5696 bytes
font_01_sfnt_off0000797a.bin
b95ed3490bdb1228e089edcaf2a87ae76805b15c5b60c0ed0fcf074f82725d4a
pdf-font-stream PDF embedded font (sfnt) at offset 0x797A 10364 bytes