Malicious PDF — malware analysis report

Static analysis result for SHA-256 e54d2002bf6df63f…

MALICIOUS

PDF

44.7 KB Created: 2020-08-29 10:57:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0a85ddad44460a884c324152f8e5fea9 SHA-1: fbcf089624808d2d2e76b4bc38e4f83df4408ed0 SHA-256: e54d2002bf6df63faf5ef744ecfded0d880122711c6b57b4ad2153882cec08c7
152 Risk Score

Malware Insights

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

The PDF document contains a high number of embedded links, with a critical heuristic firing for a malicious redirector link. The ML classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, contains the URL https://ttraff.com/wix?keyword=way+of+the+warrior+kid+summary, which is identified as a malicious redirector. This suggests the document is designed to lure users to malicious content through a chain of redirects.

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/wix?keyword=way+of+the+warrior+kid+summary
    • https://cdn.shopify.com/s/files/1/0439/9484/1246/files/3388764534.pdf
    • https://cdn.shopify.com/s/files/1/0431/2779/9969/files/forest_gnome_druid.pdf
    • https://cdn.shopify.com/s/files/1/0430/3477/1610/files/98231649765.pdf
    • https://cdn.shopify.com/s/files/1/0428/0510/0707/files/muluwilumepexilebuw.pdf
    • https://cdn.shopify.com/s/files/1/0435/6508/8917/files/7619584339.pdf
    • https://cdn.shopify.com/s/files/1/0440/7679/4021/files/sikululal.pdf
    • https://cdn.shopify.com/s/files/1/0437/8394/6397/files/12037620288.pdf
    • https://cdn.shopify.com/s/files/1/0428/8980/5983/files/38858268365.pdf
    • https://static.usrfiles.com/ugd/b8c837_1112bd4c0fe44668bc639dba48c50f67.pdf
    • https://static.usrfiles.com/ugd/b8c837_25b58bb01a5243d7ab4e2c5c332ed164.pdf
    • https://static.usrfiles.com/ugd/b8c837_4f4fad99df694fcabbcc53da8f491fd4.pdf
    • https://static.usrfiles.com/ugd/b8c837_aedd182e2617426d929e71c17f56f1c8.pdf
    • https://static.usrfiles.com/ugd/b8c837_4dbfd1bb29f6442f87913fea45ad7d39.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/30547733638.pdf
    • https://cdn.shopify.com/s/files/1/0431/7993/3862/files/grade_7_math_probability_worksheets.pdf
    • https://cdn.shopify.com/s/files/1/0430/5344/9365/files/44646349058.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_off00007186.bin
e7dc8295da4e5885d24d43365d657dbdf542ceaa685ea4faf4a00ce23bb65793
pdf-font-stream PDF embedded font (sfnt) at offset 0x7186 5388 bytes
font_01_sfnt_off000083d8.bin
b0ea90c53f01f6197b592e24e27b5fe9ec968ed3cb9ca4fce11fcfbdafb247b4
pdf-font-stream PDF embedded font (sfnt) at offset 0x83D8 10024 bytes