Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e750c673ec117e4…

MALICIOUS

PDF

46.1 KB Created: 2020-08-04 21:31:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c34156f1767fd7df5bf7d05f72a60992 SHA-1: 4fa90f24255fbc751bdf2188e47517f1447e5f2f SHA-256: 4e750c673ec117e453a1199ac5a5dd50b720d0c74ec5f8f5047758e53bfc703b
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a redirector service (ttraff.cc). The document body, though heavily obfuscated, contains the same URL as the primary malicious link. This suggests the document's purpose is to redirect the user to malicious content via these links. 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.cc/pify?keyword=assessment+strategies+and+tools+pdf
    • http://files.imaginings-with-rene.com/uploads/1/3/2/6/132682076/xuxixib.pdf
    • http://files.elizabethlaude.com/uploads/1/3/0/7/130740033/jofazavukigiputilos.pdf
    • http://files.alexandrakulick.com/uploads/1/3/2/3/132302824/kiwejobe.pdf
    • http://files.galgositalianos.com/uploads/1/3/1/6/131637553/zonimiwokajux.pdf
    • http://files.hc-junction.com/uploads/1/3/1/6/131636725/98d7fe1319bd1.pdf
    • https://cdn.shopify.com/s/files/1/0433/8958/3514/files/boketuwebivasifadojezo.pdf
    • https://cdn.shopify.com/s/files/1/0430/9037/8909/files/43005127083.pdf
    • https://cdn.shopify.com/s/files/1/0433/7605/0330/files/tepuzubasidawu.pdf
    • https://cdn.shopify.com/s/files/1/0429/6271/4773/files/82635248147.pdf
    • https://cdn.shopify.com/s/files/1/0436/2305/5523/files/lyman_reloading_manual_50th_edition_download.pdf
    • https://cdn.shopify.com/s/files/1/0431/6738/3713/files/wujevuvilesenosomiw.pdf
    • https://cdn.shopify.com/s/files/1/0437/6798/8376/files/xonulipik.pdf
    • https://cdn.shopify.com/s/files/1/0431/2114/8061/files/conjugaison_du_verbe_etre_et_avoir_en_anglais.pdf
    • https://cdn.shopify.com/s/files/1/0432/9432/6949/files/bonakafiwa.pdf
    • https://cdn.shopify.com/s/files/1/0438/1956/5216/files/ralafupolopaladinosibem.pdf
    • https://cdn.shopify.com/s/files/1/0429/9476/1877/files/52000547181.pdf
    • https://cdn.shopify.com/s/files/1/0437/9875/7538/files/17980037206.pdf
    • https://cdn.shopify.com/s/files/1/0437/1267/5990/files/vefabisufuso.pdf
    • https://cdn.shopify.com/s/files/1/0430/3034/7938/files/befupivolobefifapu.pdf
    • https://cdn.shopify.com/s/files/1/0433/7103/6822/files/84714005317.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_off0000759f.bin
a05a91c4fe3fac76d1aa03b90a92a9e06dd1f83159160e79a1fc508338299ca8
pdf-font-stream PDF embedded font (sfnt) at offset 0x759F 5348 bytes
font_01_sfnt_off000087b6.bin
e71a0eb71b421d806da5baa0d628ca13fa05f2f631d3afeb28eaec56aa263f70
pdf-font-stream PDF embedded font (sfnt) at offset 0x87B6 10444 bytes