Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c21c1c5067acdec…

MALICIOUS

PDF

45.5 KB Created: 2020-07-29 22:30:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f38d68c9c4e0ba597f7694b614c7c3f4 SHA-1: 3a07fbeffb20164606513d8c3b797f576943fed8 SHA-256: 2c21c1c5067acdec88310ba111b8cfca4c13a3b230782e06344077cdf9b4e4ff
152 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one pointing to a known malicious redirector (ttraff.com). The ML classifier also strongly indicated maliciousness. The document body appears to be obfuscated or corrupted, but the presence of a link farm and a malicious redirector suggests a phishing or scam attempt.

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=punctuation+guide+pdf
    • http://files.thefountainchurchofgod.com/uploads/1/3/1/3/131383982/8998885.pdf
    • http://files.suzannejoyal.com/uploads/1/3/1/8/131872079/11c79b.pdf
    • http://files.foundationforsustainableliving.org/uploads/1/3/2/6/132695416/1718880.pdf
    • http://files.flyerconsulting.com/uploads/1/3/2/8/132815791/2293023.pdf
    • http://files.1corinthiens15.com/uploads/1/3/1/4/131438137/8777737.pdf
    • http://files.flyerconsu
    • https://cdn.shopify.com/s/files/1/0431/4185/7448/files/83053820264.pdf
    • https://cdn.shopify.com/s/files/1/0429/6992/3740/files/numefakasaropanom.pdf
    • https://cdn.shopify.com/s/files/1/0431/4251/2797/files/butojepi.pdf
    • https://cdn.shopify.com/s/files/1/0431/4769/0145/files/28671218909.pdf
    • https://cdn.shopify.com/s/files/1/0429/7578/9215/files/98605193455.pdf
    • https://cdn.shopify.com/s/files/1/0435/4398/6335/files/lonutujegi.pdf
    • https://cdn.shopify.com/s/files/1/0432/8158/0200/files/2291694628.pdf
    • https://cdn.shopify.com/s/files/1/0434/5082/6919/files/zujobubisul.pdf
    • https://cdn.shopify.com/s/files/1/0431/4087/4408/files/51626233755.pdf
    • https://cdn.shopify.com/s/files/1/0439/1780/3675/files/5585391681.pdf
    • https://cdn.shopify.com/s/files/1/0430/6380/4058/files/jaxuvefunorumuj.pdf
    • https://cdn.shopify.com/s/files/1/0428/2833/3219/files/mejosuk.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/lafiku.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_off00007397.bin
345a93dec8cd2b9a0d602072adb4d67efda109df59f5c487debb493454c71e19
pdf-font-stream PDF embedded font (sfnt) at offset 0x7397 4900 bytes
font_01_sfnt_off0000844e.bin
3195a3d5c5823c1c22070446d1180a1988b5fdfacb2ebcf2d5f42bfab3d1ebba
pdf-font-stream PDF embedded font (sfnt) at offset 0x844E 10220 bytes