Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd9dd169ef7a127f…

MALICIOUS

PDF

44.9 KB Created: 2020-08-05 04:32:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8e13075301ad3793faf9834b8a297e21 SHA-1: c089ce63bef8786258ad4dcbea1cb5324cf714e3 SHA-256: bd9dd169ef7a127f50cd474b1feddbe713f2b8935bdf1db1a0a4f31ccee42a58
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to a link farm hosted on cdn.shopify.com. One critical heuristic identified a link to a known malicious redirector at ttraff.ru, which is likely intended to obscure the final destination. The document body, though heavily obfuscated, contains the URL that triggered the malicious redirector heuristic. The presence of numerous external links suggests a tactic to distribute malicious content or engage in SEO manipulation for malicious purposes.

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.ru/pify?keyword=email+etiquette+pdf
    • http://files.artistfrancesconde.com/uploads/1/3/0/8/130815080/sunuvabipola.pdf
    • http://files.distinctdancecenter.com/uploads/1/3/0/7/130739369/visokikowukisu.pdf
    • http://files.komisar.com/uploads/1/3/1/0/131070561/9342571.pdf
    • http://files.coglpcity.com/uploads/1/3/0/8/130814124/fumutuk_zonil_roridupol_jovolapenabukuj.pdf
    • http://files.karlswensonphotography.com/uploads/1/3/1/4/131453214/f14488e.pdf
    • https://cdn.shopify.com/s/files/1/0437/0645/0074/files/41925007650.pdf
    • https://cdn.shopify.com/s/files/1/0430/0665/6666/files/57466103081.pdf
    • https://cdn.shopify.com/s/files/1/0429/0392/8991/files/oceanic_tv_guide.pdf
    • https://cdn.shopify.com/s/files/1/0435/8986/1535/files/70777216935.pdf
    • https://cdn.shopify.com/s/files/1/0429/4996/8035/files/47307499194.pdf
    • https://cdn.shopify.com/s/files/1/0433/1352/8987/files/chamakam_meaning_in_telugu.pdf
    • https://cdn.shopify.com/s/files/1/0428/3236/3676/files/12986849997.pdf
    • https://cdn.shopify.com/s/files/1/0431/0990/8637/files/77870349037.pdf
    • https://cdn.shopify.com/s/files/1/0430/8130/2167/files/wireless_communication_by_rappaport_2nd_edition.pdf
    • https://cdn.shopify.com/s/files/1/0433/0923/6374/files/tosib.pdf
    • https://cdn.shopify.com/s/files/1/0431/6508/9949/files/dupubinesejuvijez.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/denikiv.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000660b.bin
49246d77dec56fa8d5a599e8a62133f1b3669d198455370c6a27984e801013e5
pdf-font-stream PDF embedded font (sfnt) at offset 0x660B 4664 bytes
font_01_sfnt_off000075e2.bin
5cbd7b86f644008b449c51e0dcf4a531a5641054b6021e16476094d40f9ab618
pdf-font-stream PDF embedded font (sfnt) at offset 0x75E2 10180 bytes
font_02_sfnt_off000098ba.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333
pdf-font-stream PDF embedded font (sfnt) at offset 0x98BA 4324 bytes