Malicious PDF — malware analysis report

Static analysis result for SHA-256 86efb8201bc29369…

MALICIOUS

PDF

41.9 KB Created: 2020-08-20 23:45:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f993f264dddb24318c94d9c19aec69c0 SHA-1: 5e53e48d0f2e3fe18cb0fc8ad12acfdb9bc46410 SHA-256: 86efb8201bc293691294741ce8535d476ad29d3e67096c8840559dc0a25e8d36
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains embedded links, one of which points to a known malicious redirector. The document body text and embedded URLs suggest a lure for free antivirus activation codes, a common phishing tactic. The ML classifier also strongly indicated maliciousness. The primary attack vector appears to be social engineering via a deceptive link within the document.

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/pify?keyword=kaspersky+antivirus+2010+activation+code+free
    • http://files.ericgamalinda.com/uploads/1/3/0/8/130874284/wagamekamizili-tumukibu-rafufebuj-wotan.pdf
    • http://files.growlerlamp.com/uploads/1/3/1/0/131070940/mulupaborajimeraw.pdf
    • https://cdn.shopify.com/s/files/1/0427/5752/1574/files/31640033744.pdf
    • https://cdn.shopify.com/s/files/1/0428/4078/5062/files/lateral_epicondylitis_patient_exercises.pdf
    • https://cdn.shopify.com/s/files/1/0431/2147/5738/files/muzegar.pdf
    • https://cdn.shopify.com/s/files/1/0433/4521/5656/files/94660834275.pdf
    • https://cdn.shopify.com/s/files/1/0433/2729/1544/files/47615041135.pdf
    • https://cdn.shopify.com/s/files/1/0431/1767/4656/files/job_interview_conversation.pdf
    • https://cdn.shopify.com/s/files/1/0438/4030/7362/files/remove_blank_page_online.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_off000064df.bin
64dffa06b00c350cc2ae873e9c509cff8f69a734d3063106c0cc14fcb8614ed6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x64DF 5636 bytes
font_01_sfnt_off0000782c.bin
a5e596f1d0a6602dd26871231aa6e3fa8b4acccce9e531484b644e1a3e6af88e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x782C 10244 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.