Malicious PDF — malware analysis report

Static analysis result for SHA-256 d7e36aaebb0a2083…

MALICIOUS

PDF

61.1 KB Created: 2020-08-24 06:50:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3767c2c2bf7eb03ff899c844f1c98653 SHA-1: ce559aac76c619f135a0faa77156355a03478ebb SHA-256: d7e36aaebb0a2083a0295d4376a412a5e34d1159c06160d3e31fd87761877656
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a mass of external links, including a critical redirector link to 'ttraff.cc'. The document body, though heavily obfuscated, contains text related to 'Sql enterprise licensing guide' and the malicious URL, suggesting a lure. The ML classifier also strongly flagged this PDF as malicious. The primary attack vector appears to be a phishing attempt using a link farm to redirect users to malicious content.

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/pify?keyword=sql+enterprise+licensing+guide
    • http://files.dorseyreunion1967.com/uploads/1/3/2/8/132815123/15d9e6.pdf
    • http://files.thesweetwhiskboutique.com/uploads/1/3/0/7/130775753/pifur-lomerukifeb-xujizavifase-xaxisifa.pdf
    • https://cdn.shopify.com/s/files/1/0431/7259/3832/files/18071096162.pdf
    • https://cdn.shopify.com/s/files/1/0438/1717/3149/files/62708974677.pdf
    • https://cdn.shopify.com/s/files/1/0429/3787/6639/files/boy_scouts_of_the_philippines_handbook.pdf
    • https://cdn.shopify.com/s/files/1/0431/9988/9571/files/kopedezilenikebiza.pdf
    • https://cdn.shopify.com/s/files/1/0431/0604/2023/files/vendaje_capelina.pdf
    • https://cdn.shopify.com/s/files/1/0429/7188/9817/files/29731983788.pdf
    • https://cdn.shopify.com/s/files/1/0431/5430/9274/files/gurufadovalasiv.pdf
    • https://cdn.shopify.com/s/files/1/0429/8070/4405/files/noterofarojixadifajo.pdf
    • https://cdn.shopify.com/s/files/1/0429/3538/6265/files/bisilabukixugovujopewi.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_off0000b31b.bin
377977fce5ee7fffaec6cc8d5e10e63cdb1e6b8d2fb65d56f2e0dcbe76be3720
pdf-font-stream PDF embedded font (sfnt) at offset 0xB31B 5260 bytes
font_01_sfnt_off0000c4f9.bin
d48f55395a3a8c747d53252fc033759b15eb76f4bf3a12d9a1d2e67647932383
pdf-font-stream PDF embedded font (sfnt) at offset 0xC4F9 10216 bytes