Malicious PDF — malware analysis report

Static analysis result for SHA-256 b24a297dbaf7878b…

MALICIOUS

PDF

50.9 KB Created: 2020-08-20 10:33:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e36172f747db7a96b9b5c8cc339ad7d5 SHA-1: 40a8de7d984432b4eb490d6c9121cd73a31a5d89 SHA-256: b24a297dbaf7878bc35cef0393df80c1830d78c483bf616674f12861f9e431cc
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://ttraff.com/pify?keyword=cerazette+mini+pill+information+leaflet'. This URL is likely part of a phishing or scam campaign, attempting to lure users with information about medication. The document body, though heavily obfuscated, also contains this URL and numerous other PDF links, many hosted on Shopify, suggesting a link farm for SEO manipulation or to host malicious content. 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.com/pify?keyword=cerazette+mini+pill+information+leaflet
    • http://rilelivib.thebird-dogs.com/uploads/1/3/2/8/132814975/6962586.pdf
    • http://files.labellaglo.com/uploads/1/3/1/3/131379615/fateranuliware.pdf
    • http://files.sampriti.us/uploads/1/3/1/8/131858975/xakasagaputun_webirupuwi_liwalamidoru.pdf
    • http://vurajumo.theenglishegg.com/uploads/1/3/0/7/130776088/rusubizaketoge-nubovazolope-vubuzal-zopemosareviwu.pdf
    • https://cdn.shopify.com/s/files/1/0440/5588/8022/files/63726216816.pdf
    • https://cdn.shopify.com/s/files/1/0434/6681/7702/files/9836374514.pdf
    • https://cdn.shopify.com/s/files/1/0437/5461/9041/files/15102476060.pdf
    • https://cdn.shopify.com/s/files/1/0430/4060/4313/files/45938187112.pdf
    • https://cdn.shopify.com/s/files/1/0435/3448/3605/files/melenurarilovudopav.pdf
    • https://cdn.shopify.com/s/files/1/0434/0681/9493/files/60872143797.pdf
    • https://cdn.shopify.com/s/files/1/0432/8800/2710/files/blue_eyes_technology_download.pdf
    • https://cdn.shopify.com/s/files/1/0437/4550/9537/files/pdf_vs_pmf_vs_cdf.pdf
    • https://cdn.shopify.com/s/files/1/0437/8093/1742/files/reading_strategies_by_jennifer_serravallo.pdf
    • https://cdn.shopify.com/s/files/1/0430/4922/2298/files/70151414107.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_off00008a17.bin
cdf684e99228b12aef6f54204342b74dd2248f985fc654073a8978ce9d5af839
pdf-font-stream PDF embedded font (sfnt) at offset 0x8A17 4824 bytes
font_01_sfnt_off00009a6b.bin
dece7a537b08271e71ac0abcc8050c186ceac38ad5825008ace7a59a354b03d7
pdf-font-stream PDF embedded font (sfnt) at offset 0x9A6B 10600 bytes