Malicious PDF — malware analysis report

Static analysis result for SHA-256 a4642ab009050655…

MALICIOUS

PDF

42.2 KB Created: 2020-08-26 13:46:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ae6a00ead71c456fa29dce4c84f9affe SHA-1: 4442435220e3d5d17aaaea31a7472171b0291ebe SHA-256: a4642ab00905065532b3a178f3832c2e04c74e71b6d8f286afdc08dbd79c7973
150 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.cc/pify?keyword=slipknot+the+gray+chapter+torrent'. This indicates the document's primary purpose is to redirect users to potentially harmful content, likely a phishing or malware distribution site. The presence of a large number of external PDF links, many hosted on Shopify, suggests a link farm SEO tactic to improve search engine ranking for malicious content. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.
  • 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.
  • 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=slipknot+the+gray+chapter+torrent
    • http://files.dahammaak2k.com/uploads/1/3/1/4/131409442/237179.pdf
    • http://mejiveka.kaoscup.com/uploads/1/3/1/6/131637814/mosoxinapujex_diteluwewikajo_lusanugo.pdf
    • http://files.katycupcakes.com/uploads/1/3/1/4/131483249/suparumesimozoji.pdf
    • http://fiter.texasredbuddental.com/uploads/1/3/1/4/131453206/7791007.pdf
    • http://files.liberationgifts.com/uploads/1/3/0/8/130874655/fepupekubevage.pdf
    • https://cdn.shopify.com/s/files/1/0434/0776/9750/files/81187085438.pdf
    • https://cdn.shopify.com/s/files/1/0432/0496/8603/files/damixerodezama.pdf
    • https://cdn.shopify.com/s/files/1/0431/2619/4336/files/4215500519.pdf
    • https://cdn.shopify.com/s/files/1/0429/8627/4967/files/cycle_se_dj_song.pdf
    • https://cdn.shopify.com/s/files/1/0463/5767/6193/files/rofofaxo.pdf
    • https://cdn.shopify.com/s/files/1/0432/3121/5780/files/nabuvatonirisenis.pdf
    • https://cdn.shopify.com/s/files/1/0434/8837/9032/files/17885682133.pdf
    • https://cdn.shopify.com/s/files/1/0458/0799/2998/files/zalora_apk_latest.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000058ce.bin
bba65eb2a4854f0e55f300dac5e4924cdf52014948ed599648600f4610ee9829		 pdf-font-stream PDF embedded font (sfnt) at offset 0x58CE 5072 bytes
font_01_sfnt_off00006a06.bin
bb627d2c59c074c452d239a369828f5cc8e4eb0d02afbefe3e57e33a8f92521b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A06 10456 bytes
font_02_sfnt_off00008dc5.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8DC5 4324 bytes

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