Malicious PDF — malware analysis report

Static analysis result for SHA-256 c54180efe681254c…

MALICIOUS

PDF

42.1 KB Created: 2020-08-29 23:38:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e67bd9320d87edf55212db79ba119514 SHA-1: bf9c9213a4c60c166b3f22246ae8c8dc7f63611d SHA-256: c54180efe681254c0e3799d71739bd910f51f27c9b5ba6edb2368f6416efca38
154 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 'https://ttraff.com/wix?keyword=star+wars+7+news'. Additionally, it features a PDF link farm with numerous links hosted on cdn.shopify.com, with 'https://cdn.shopify.com/s/files/1/0464/5578/3592/files/kulolelob.pdf' being the first listed. The document body, though heavily obfuscated, contains references to the malicious URL and the 'Star Wars 7' lure. The ML classifier also 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.com/wix?keyword=star+wars+7+news
    • https://cdn.shopify.com/s/files/1/0464/5578/3592/files/kulolelob.pdf
    • https://cdn.shopify.com/s/files/1/0435/6807/0824/files/angina_instavel.pdf
    • https://cdn.shopify.com/s/files/1/0440/8272/5029/files/mimana_iyar_chronicle.pdf
    • https://cdn.shopify.com/s/files/1/0433/9931/5619/files/luruxepilovazusavoluvuxem.pdf
    • https://cdn.shopify.com/s/files/1/0447/2664/8985/files/two_stroke_si_engine.pdf
    • https://cdn.shopify.com/s/files/1/0430/6383/6834/files/31979741779.pdf
    • https://cdn.shopify.com/s/files/1/0435/5453/7624/files/66387743582.pdf
    • https://cdn.shopify.com/s/files/1/0430/8788/8535/files/42330717508.pdf
    • https://cdn.shopify.com/s/files/1/0432/1522/4996/files/kuviripapotu.pdf
    • https://cdn.shopify.com/s/files/1/0428/9023/1974/files/command_line_reference_a_z_windows_7.pdf
    • https://cdn.shopify.com/s/files/1/0430/9496/6429/files/folakevesaxexi.pdf
    • https://cdn.shopify.com/s/files/1/0430/4578/1665/files/java_development_kit_download.pdf
    • https://cdn.shopify.com/s/files/1/0434/5122/0120/files/72888861428.pdf
    • https://cdn.shopify.com/s/files/1/0428/8482/5247/files/twixtor_sony_vegas_14_free.pdf
    • https://cdn.shopify.com/s/files/1/0432/2190/9662/files/rufomulupejariki.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_off00006649.bin
13f4b02da1e998fefe5e7a035a1488edaba8f2049fd82b36128b7f7a216a3789
pdf-font-stream PDF embedded font (sfnt) at offset 0x6649 4920 bytes
font_01_sfnt_off00007724.bin
b459cab174d281393f8c5600ad65c15a28af6d49c466182e35fb1a51e33147d1
pdf-font-stream PDF embedded font (sfnt) at offset 0x7724 10536 bytes