Malicious PDF — malware analysis report

Static analysis result for SHA-256 d5bb74c92782c0b7…

MALICIOUS

PDF

59.6 KB Created: 2020-08-05 09:48:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: deb4b358b49ac1e3ef4b1b1dee657a6e SHA-1: fcadd2321b2fdf24bbd929b233e43d57ea4014ef SHA-256: d5bb74c92782c0b7e837c370033f6aa47fa34d853ea2702092405c36d57d2ce2
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious File

The PDF file contains numerous embedded URLs, many pointing to Shopify-hosted PDFs, forming a link farm. One critical heuristic identified a link to a known malicious redirector, ttraff.com, which is likely the primary malicious component. The ML classifier strongly supports the malicious verdict. The document body, though heavily obfuscated, contains references to the redirector URL and other PDF links, suggesting a coordinated effort to distribute content or redirect users to malicious sites.

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=appareil+digestif+de+la+poule+pdf
    • http://files.capitalcitycupsc.com/uploads/1/3/1/6/131636988/gusimevafepexopomud.pdf
    • http://files.baileycowhorses.net/uploads/1/3/0/7/130776575/wabod.pdf
    • http://files.abcpelican.org/uploads/1/3/0/7/130776861/wobafekakopepetoz.pdf
    • http://files.garehime.com/uploads/1/3/0/7/130740249/zokugikusixoter.pdf
    • https://cdn.shopify.com/s/files/1/0438/2985/4368/files/sasitofozatap.pdf
    • https://cdn.shopify.com/s/files/1/0428/9799/7991/files/masopotupamazedab.pdf
    • https://cdn.shopify.com/s/files/1/0436/8737/9097/files/zekulorog.pdf
    • https://cdn.shopify.com/s/files/1/0429/3410/8323/files/53476126869.pdf
    • https://cdn.shopify.com/s/files/1/0438/1769/7437/files/13643012183.pdf
    • https://cdn.shopify.com/s/files/1/0429/9948/0473/files/kirupotanojokobamunaweno.pdf
    • https://cdn.shopify.com/s/files/1/0432/0778/6651/files/71253745122.pdf
    • https://cdn.shopify.com/s/files/1/0435/1646/1211/files/oxford_book_of_latin_american_short_stories.pdf
    • https://cdn.shopify.com/s/files/1/0433/5370/2550/files/wifotosikuvew.pdf
    • https://cdn.shopify.com/s/files/1/0428/3459/1907/files/23434007468.pdf
    • https://cdn.shopify.com/s/files/1/0436/4523/9456/files/47559530269.pdf
    • https://cdn.shopify.com/s/files/1/0433/9128/7461/files/15673004376.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_off00009e12.bin
d5c1f79a0a6af8202e705ad308e6eb14a8dff68607d30c4b1f9a199a384a16e7
pdf-font-stream PDF embedded font (sfnt) at offset 0x9E12 5200 bytes
font_01_sfnt_off0000afd0.bin
517cee2efcb2b9e18f3317f9ed53c0ca84bed5ce5d6a83fc462fbb7664744e10
pdf-font-stream PDF embedded font (sfnt) at offset 0xAFD0 15900 bytes