Malicious PDF — malware analysis report

Static analysis result for SHA-256 980223b864082127…

MALICIOUS

PDF

37.5 KB Created: 2020-08-03 19:05:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 154ebe4a1392f554ab715f68b2d9e288 SHA-1: 18cd97ff2f1a67e62de579ecfcc718ada1c882e3 SHA-256: 980223b864082127f521e1b676a367f2dd1fe94fc56ebd980f458733b5578fcb
152 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.ru, which is disguised as a calendar. This redirector is likely used to funnel victims to a malicious payload. The PDF also contains a large number of links to other PDFs hosted on Shopify, suggesting a link farm or SEO poisoning tactic to improve search engine visibility for malicious content. The ML classifier strongly indicated maliciousness.

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.ru/pify?keyword=calend%25C3%25A1rio+2020+e+2020+pdf
    • http://files.corechiropracticandperformance.com/uploads/1/3/0/9/130969209/jizipabob.pdf
    • http://files.magnoliachapter14oes-pha.com/uploads/1/3/1/4/131411281/82973d52.pdf
    • http://sefid.healingaxis.com/uploads/1/3/0/7/130774993/c62e8ebbf1.pdf
    • http://files.rp-360.com/uploads/1/3/1/3/131398479/722009.pdf
    • http://rigasuxiz.koasportsleague.com/uploads/1/3/2/7/132740978/8839883.pdf
    • https://cdn.shopify.com/s/files/1/0430/8955/9705/files/11714965524.pdf
    • https://cdn.shopify.com/s/files/1/0433/7857/3464/files/20270557175.pdf
    • https://cdn.shopify.com/s/files/1/0428/1411/1903/files/kejiboxipixojolon.pdf
    • https://cdn.shopify.com/s/files/1/0433/1828/0357/files/denopugulolejo.pdf
    • https://cdn.shopify.com/s/files/1/0434/8513/5014/files/92261944387.pdf
    • https://cdn.shopify.com/s/files/1/0428/7637/1110/files/garivadalexa.pdf
    • https://cdn.shopify.com/s/files/1/0431/5945/3845/files/cset_science_practice_test.pdf
    • https://cdn.shopify.com/s/files/1/0432/1227/5870/files/26652633255.pdf
    • https://cdn.shopify.com/s/files/1/0432/3419/7666/files/nawudozawukex.pdf
    • https://cdn.shopify.com/s/files/1/0428/5346/6271/files/zewufebexasode.pdf
    • https://cdn.shopify.com/s/files/1/0432/7240/5157/files/28471220709.pdf
    • https://cdn.shopify.com/s/files/1/0436/2692/2146/files/89044595037.pdf
    • https://cdn.shopify.com/s/files/1/0431/3789/2509/files/96243113174.pdf
    • https://cdn.shopify.com/s/files/1/0440/1886/0190/files/9275113239.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_off000051eb.bin
c40f0524655794b7c611a5047d854b49b41d1e659e1ca7f17f79b8c15a850591		 pdf-font-stream PDF embedded font (sfnt) at offset 0x51EB 5272 bytes
font_01_sfnt_off00006352.bin
af127b51f9e62f433d48b53da994e6f1645fc7740f6dbab53d47e31c26d1a89f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6352 11488 bytes

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