Malicious PDF — malware analysis report

Static analysis result for SHA-256 5169a0c78eb26eb7…

MALICIOUS

PDF

40.5 KB Created: 2020-08-20 23:15:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d5af39ae0c4f25a4305bfb69d43fd721 SHA-1: eb11bad88ade6ca6af9ad019f9da865cf5c2e558 SHA-256: 5169a0c78eb26eb7eb72702b1ef3ea611f7e679dce30547c0a4c09a8c286d6dc
152 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded URLs, many hosted on Shopify. The ML classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, contains the primary malicious URL, suggesting the document's purpose is to lure users to this redirector.

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=ambala+song+masstamilan
    • http://files.bridgetutorial.net/uploads/1/3/1/3/131380445/tarevusijojapob.pdf
    • http://vexew.spotteddots.com/uploads/1/3/1/4/131437069/3026803.pdf
    • https://cdn.shopify.com/s/files/1/0433/7149/5574/files/75521998149.pdf
    • https://cdn.shopify.com/s/files/1/0433/9813/5966/files/kittens_game_religion.pdf
    • https://cdn.shopify.com/s/files/1/0431/3304/2839/files/pujuvesipelipejasuratiniz.pdf
    • https://cdn.shopify.com/s/files/1/0436/2112/2211/files/33471745190.pdf
    • https://cdn.shopify.com/s/files/1/0431/4143/1464/files/wisexurefus.pdf
    • https://cdn.shopify.com/s/files/1/0428/6529/5526/files/76179701626.pdf
    • https://cdn.shopify.com/s/files/1/0430/2536/7193/files/31279318504.pdf
    • https://cdn.shopify.com/s/files/1/0433/7975/3121/files/55036640912.pdf
    • https://cdn.shopify.com/s/files/1/0429/9007/6067/files/burris_fastfire_2_manual.pdf
    • https://cdn.shopify.com/s/files/1/0444/1423/8887/files/19492751663.pdf
    • https://cdn.shopify.com/s/files/1/0431/6545/0391/files/nifuwanuzusop.pdf
    • https://cdn.shopify.com/s/files/1/0440/4399/3238/files/fatapanupumiwamosopupogun.pdf
    • https://cdn.shopify.com/s/files/1/0433/1415/1589/files/35362742675.pdf
    • https://cdn.shopify.com/s/files/1/0432/3262/4808/files/gikawamewezijutumiz.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_off00005348.bin
be1259b39c55363e06c5175d316ddf70313d09b1c4c7e4918ee32ecac73ecddf
pdf-font-stream PDF embedded font (sfnt) at offset 0x5348 5040 bytes
font_01_sfnt_off00006459.bin
ae52cf968de72c3464e5d8a695f016cd81cbc41541013a812663364d2a0ec1fd
pdf-font-stream PDF embedded font (sfnt) at offset 0x6459 15092 bytes