Malicious PDF — malware analysis report

Static analysis result for SHA-256 eaebca979f33a60a…

MALICIOUS

PDF

32.7 KB Created: 2020-09-16 10:21:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 03125e5da5ab476aa94171e65e9b420a SHA-1: 81eadceba80fd201333761c20f93a97cbce7d385 SHA-256: eaebca979f33a60a4583d3881fa10f228204782fe34f057e5642c6c67dc21512
150 Risk Score

Malware Insights

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

The PDF contains a high number of embedded links, many pointing to static.usrfiles.com, which is indicative of a link farm. One critical heuristic identified a link to a known malicious redirector, ttraff.me, which is likely the primary malicious payload delivery mechanism. The document body, though heavily obfuscated, contains the same URL and text related to wine, suggesting a lure for a phishing or scam operation. No scripts were extracted from this sample.

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.me/pify?keyword=sycamore+lane+wine+cabernet+sauvignon
    • https://static.usrfiles.com/ugd/6812d7_0721c8b4fb81496499ca37eb076504ea.pdf
    • https://static.usrfiles.com/ugd/70094d_b0810af08b3d49a19d6064440463d867.pdf
    • https://static.usrfiles.com/ugd/665c20_0fadfde8ce1b402b93ec7769d7b908a1.pdf
    • https://cdn.shopify.com/s/files/1/0429/6487/7471/files/labininudurozoxogunefu.pdf
    • https://static.usrfiles.com/ugd/185811_a7057df4a65d4b19b62bd8199da71f45.pdf
    • https://static.usrfiles.com/ugd/3f4b99_acdb40afb7e8453a95d6136afc81beb3.pdf
    • https://static.usrfiles.com/ugd/432b07_4f0517e7bea84f8a8837450bacc04a95.pdf
    • https://static.usrfiles.com/ugd/6908d7_31505a8e8aeb4b22ab98eaff550ad596.pdf
    • https://static.usrfiles.com/ugd/e78b77_67c94796ff2d47909108523fdb279184.pdf
    • https://static.usrfiles.com/ugd/c57cae_2008100046664db395c12e72c651cc23.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_off000041aa.bin
9161d88ae8d1cbb6f63a53cb7e4194b0cd46e39528c3d760c35ad46812f219c0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x41AA 5616 bytes
font_01_sfnt_off000054d4.bin
774223a0b7c20e52df25c4bc0cc3cc28f53b81c897a9e5b6ce18fd02ee3b3710		 pdf-font-stream PDF embedded font (sfnt) at offset 0x54D4 9928 bytes

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