Malicious PDF — malware analysis report

Static analysis result for SHA-256 169697c6793401bc…

MALICIOUS

PDF

48.5 KB Created: 2020-08-19 19:47:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 54d7e803ca774ba50b3080309aa76b2a SHA-1: 86c59b6df308173ee133b2d7ec828298d1dbbdd2 SHA-256: 169697c6793401bc98cf61044c72ad9fd0f0f9bed446145181ffef768df1660a
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a high number of embedded links, many of which point to a URL shortener service known for malicious redirects. The ML classifier also strongly indicated maliciousness. The primary malicious IOC is the redirector URL, which likely leads to a phishing page or malware download.

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.cc/pify?keyword=cellular+sheet+pile+cofferdam
    • http://files.richmondathletic.co.nz/uploads/1/3/2/7/132740181/zozame-rutuwudusi-midawusapunozu-firinatukavuwot.pdf
    • http://demeja.christianmindfulness.com/uploads/1/3/2/3/132302780/2602933.pdf
    • http://files.mindfulfamilycircles.com/uploads/1/3/1/6/131637896/1498fc6be00102.pdf
    • http://kibepaxa.hawaiitherapist.com/uploads/1/3/1/1/131164250/fd975e0.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/3601/6803/files/dobejivavokatowesekepu.pdf
    • https://cdn.shopify.com/s/files/1/0432/8236/6624/files/gigekagopoj.pdf
    • https://cdn.shopify.com/s/files/1/0437/8840/2839/files/gafukewirigiximaj.pdf
    • https://cdn.shopify.com/s/files/1/0432/9222/9787/files/mariam_khan_reporting_live_new_timing.pdf
    • https://cdn.shopify.com/s/files/1/0430/4722/3458/files/zobikinedepaxevaraxorusa.pdf
    • https://cdn.shopify.com/s/files/1/0430/5072/9634/files/bobifev.pdf
    • https://cdn.shopify.com/s/files/1/0430/8995/2922/files/xisedasuxanexogekuwip.pdf
    • https://cdn.shopify.com/s/files/1/0437/6841/4370/files/43372242723.pdf
    • https://cdn.shopify.com/s/files/1/0447/9365/9543/files/77898923008.pdf
    • https://cdn.shopify.com/s/files/1/0429/8499/7025/files/ruvalewiwimetepomomasani.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007fdf.bin
ef75e66dcf68841281378cc614cafdd2c69a1cfe0c13fc0916dd296e2d737557
pdf-font-stream PDF embedded font (sfnt) at offset 0x7FDF 5300 bytes
font_01_sfnt_off000091bd.bin
d2e167a197de7d777ec0c787b91e628846b4decdeb061bce0f30b1bf78b1cf64
pdf-font-stream PDF embedded font (sfnt) at offset 0x91BD 10464 bytes