Malicious PDF — malware analysis report

Static analysis result for SHA-256 e9e83d6e6aa3d952…

MALICIOUS

PDF

40.0 KB Created: 2020-08-20 22:40:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d21844d9f09ff0bd429a5279cdf11997 SHA-1: a726fb2dc957926b03cee6d65b3fec7fac36ea94 SHA-256: e9e83d6e6aa3d952021bbd854697cc19b8f4235da1919afb046cad9090013fb0
152 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with a critical heuristic firing for a malicious redirector. The document body, though obfuscated, contains a URL that points to a known malicious redirector, suggesting an attempt to lead the user to a malicious site. The presence of numerous links hosted on cdn.shopify.com, some of which are benign, indicates a tactic to obscure the malicious destination among legitimate-looking ones.

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=dj+turntable+online
    • http://fenuj.stfrancisinthefield.net/uploads/1/3/0/9/130969060/wuwufugexejadusetige.pdf
    • http://vovadima.wncflorida.com/uploads/1/3/1/3/131398367/tofevupiboke_zogox_rosufeviw.pdf
    • http://vuvafoki.prographics3.com/uploads/1/3/0/7/130740141/zopuzenanalodil.pdf
    • https://cdn.shopify.com/s/files/1/0431/5008/2202/files/xitokuga.pdf
    • https://cdn.shopify.com/s/files/1/0427/4746/1788/files/17027094900.pdf
    • https://cdn.shopify.com/s/files/1/0439/3598/9915/files/gebabukaxuzerixoxubo.pdf
    • https://cdn.shopify.com/s/files/1/0434/2156/5078/files/parkway_drive_songs.pdf
    • https://cdn.shopify.com/s/files/1/0433/6012/5080/files/fezukarozigugimomumevesiw.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/vuvitew.pdf
    • https://cdn.shopify.com/s/files/1/0428/6224/8095/files/bontrager_trip_100_manual.pdf
    • https://cdn.shopify.com/s/files/1/0441/0530/2168/files/98873217539.pdf
    • https://cdn.shopify.com/s/files/1/0440/4363/2805/files/cursive_capital_letters_worksheet.pdf
    • http://www.fotolia.com
    • 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_off0000612b.bin
e8bf896f69e2192a1158c7752e9c57433bf6f5f24b681e3f0cf9ea75a2532888
pdf-font-stream PDF embedded font (sfnt) at offset 0x612B 4716 bytes
font_01_sfnt_off00007146.bin
7e2549dbab362a8bcec6b4b9b8b58fe44cd04019c7208dd224b0a7791f3b5daa
pdf-font-stream PDF embedded font (sfnt) at offset 0x7146 10152 bytes