Malicious PDF — malware analysis report

Static analysis result for SHA-256 f6f70b00b07919f1…

MALICIOUS

PDF

40.5 KB Created: 2020-08-19 21:47:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b3a6a1507d151434625dc9b6563cb123 SHA-1: a3ff149a15e0043f1a58385298ee2fca5ac65c3a SHA-256: f6f70b00b07919f1488e975f21e6d16d74873922b250d49bf94cc89df67a25d2
150 Risk Score

Malware Insights

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

The PDF contains a link farm and a critical redirector link pointing to ttraff.cc, which is known malicious infrastructure. The document body, though heavily obfuscated, contains the same URL and text related to job opportunities, suggesting a lure. The ML classifier strongly flagged this PDF as malicious. The primary attack pattern involves redirecting users to malicious sites under the guise of job search results.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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=business+informatics+jobs+in+egypt
    • http://baxifa.aussales.net/uploads/1/3/1/4/131482975/kinejin.pdf
    • http://files.copyslutband.com/uploads/1/3/0/7/130775675/2642613.pdf
    • http://files.paintedridgerabbitry.com/uploads/1/3/2/3/132303163/4cf8317.pdf
    • http://mabiwo.lorrainedavistraining.com/uploads/1/3/0/8/130814237/terux.pdf
    • https://cdn.shopify.com/s/files/1/0428/9318/1081/files/63680726113.pdf
    • https://cdn.shopify.com/s/files/1/0433/9384/3358/files/97883958059.pdf
    • https://cdn.shopify.com/s/files/1/0431/5657/0266/files/bekiragu.pdf
    • https://cdn.shopify.com/s/files/1/0429/1903/5033/files/gitevibukuxaba.pdf
    • https://cdn.shopify.com/s/files/1/0430/1769/9477/files/52856007126.pdf
    • https://cdn.shopify.com/s/files/1/0449/2269/9943/files/el_contraataque_liberal.pdf
    • https://cdn.shopify.com/s/files/1/0445/9102/2244/files/stardew_valley_salad.pdf
    • https://cdn.shopify.com/s/files/1/0436/4802/4741/files/10348150414.pdf
    • https://cdn.shopify.com/s/files/1/0427/4061/3286/files/74797351175.pdf
    • https://cdn.shopify.com/s/files/1/0427/3097/9495/files/faboropasozivafori.pdf
    • https://cdn.shopify.com/s/files/1/0433/7257/6922/files/10343538760.pdf
    • https://cdn.shopify.com/s/files/1/0431/1708/4839/files/chronicles_of_darkness_2e.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_off00005e85.bin
526a0d139422180672ee492020817c64ba56be462cced2c2f6a77e035ae4da6e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5E85 5668 bytes
font_01_sfnt_off000071c2.bin
be4d20bdfa7d76eb2f19f87ceec8b68b108a3238fcf45c8b5a7a946da1e7b505		 pdf-font-stream PDF embedded font (sfnt) at offset 0x71C2 10280 bytes

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