Malicious PDF — malware analysis report

Static analysis result for SHA-256 be42095c2a2ec2a7…

MALICIOUS

PDF

39.3 KB Created: 2020-09-07 14:16:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 15f0cb410b19b5993f0ea30cf4abccc8 SHA-1: 644db8c2f3c885cf6ba6bd0eb99a61937f33f086 SHA-256: be42095c2a2ec2a7d1cf50d61ccde327afc369b977f4549e570dd906674c93a4
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.link'. The document body, though heavily garbled, contains text fragments related to 'ms powerpoint' and URLs, suggesting a lure. The presence of a PDF link farm heuristic further indicates malicious intent to distribute links. 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.link/wix?keyword=ms+powerpoint+is+a+spreadsheet+software
    • https://cdn.shopify.com/s/files/1/0434/9722/6402/files/34989161877.pdf
    • https://cdn.shopify.com/s/files/1/0436/6955/3305/files/64827490103.pdf
    • https://cdn.shopify.com/s/files/1/0431/1587/2423/files/conquest_of_paradise_sheet_music_free.pdf
    • https://cdn.shopify.com/s/files/1/0428/1368/5927/files/17775767541.pdf
    • https://cdn.shopify.com/s/files/1/0427/7967/2735/files/mosesidozadegumejawifenuv.pdf
    • https://cdn.shopify.com/s/files/1/0435/0138/7936/files/tapaberuzexop.pdf
    • https://cdn.shopify.com/s/files/1/0430/7140/6237/files/55087994194.pdf
    • https://cdn.shopify.com/s/files/1/0443/1734/3900/files/35753610443.pdf
    • https://cdn.shopify.com/s/files/1/0437/7100/3037/files/xudelu.pdf
    • https://cdn.shopify.com/s/files/1/0435/4356/0346/files/bruno_mars_count_on_me_piano.pdf
    • https://cdn.shopify.com/s/files/1/0465/5418/5878/files/zumubositapegemi.pdf
    • https://cdn.shopify.com/s/files/1/0431/4736/2453/files/evaneos_guide_costa_rica.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_off00005aa8.bin
0ceebb364660b0ba9a7deb18d286e318766642f0b38eed65ee01f41f904676ad
pdf-font-stream PDF embedded font (sfnt) at offset 0x5AA8 5196 bytes
font_01_sfnt_off00006c69.bin
e3ba75df01c856af93212b9b97933f9339ded54d6f9bcaf19d670299fefe5be1
pdf-font-stream PDF embedded font (sfnt) at offset 0x6C69 10592 bytes