Malicious PDF — malware analysis report

Static analysis result for SHA-256 3633549e8f10e5ce…

MALICIOUS

PDF

100.7 KB Created: 2020-08-30 22:44:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cd8fb4f6f84823a34c838622ce9368fc SHA-1: 1e4c03b90c684ac88f255951f6e8b06733f71f72 SHA-256: 3633549e8f10e5ce6ef09ab4832f7deb8a30d4b8a0e976bfe185cced5d3c6a21
152 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 'ttraff.cc'. This URL is embedded within the document body, disguised as a 'pokemon revolution online johto guide'. The presence of a large number of external PDF links, many hosted on Shopify, suggests a link farm or SEO manipulation tactic to distribute the 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.cc/wix?keyword=pokemon+revolution+online+johto+guide
    • https://cdn.shopify.com/s/files/1/0439/8268/4318/files/gomujil.pdf
    • https://cdn.shopify.com/s/files/1/0433/9807/0426/files/suffix_ly_worksheets_grade_4.pdf
    • https://cdn.shopify.com/s/files/1/0430/5059/8562/files/nezafumotuwur.pdf
    • https://cdn.shopify.com/s/files/1/0428/8312/1319/files/60452913244.pdf
    • https://cdn.shopify.com/s/files/1/0435/2252/3288/files/xixules.pdf
    • https://cdn.shopify.com/s/files/1/0431/8317/7885/files/rodunexi.pdf
    • https://cdn.shopify.com/s/files/1/0448/2092/2528/files/durga_saptashati_mantra_in_english.pdf
    • https://cdn.shopify.com/s/files/1/0435/2652/0987/files/60195025221.pdf
    • https://cdn.shopify.com/s/files/1/0429/2250/8454/files/fifaxaxom.pdf
    • https://static.usrfiles.com/ugd/80c1db_d87abc97eff745788930beb4c35256da.pdf
    • https://static.usrfiles.com/ugd/b8c837_3c3876efe6f341cd8e81be519e492161.pdf
    • https://cdn.shopify.com/s/files/1/0432/7977/7952/files/52632975112.pdf
    • https://cdn.shopify.com/s/files/1/0433/0533/6985/files/46594844904.pdf
    • https://cdn.shopify.com/s/files/1/0438/3493/3398/files/fagubuworizezexuxudute.pdf
    • https://cdn.shopify.com/s/files/1/0432/3291/9720/files/buvavexowavimavufi.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_off00014807.bin
f343c84e1a8f8a76d94762887e4d153fc0b75f58edb945eee5b4aa1039722aea
pdf-font-stream PDF embedded font (sfnt) at offset 0x14807 5052 bytes
font_01_sfnt_off00015913.bin
b1a2276a4166727ba86a601f796df33dd1515c4465926b00fff04b846600f86d
pdf-font-stream PDF embedded font (sfnt) at offset 0x15913 14032 bytes