Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ff8a156453ef82e…

MALICIOUS

PDF

80.1 KB Created: 2020-08-10 03:26:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 49622d4d869ced25029c429d52f4171a SHA-1: e02c34268054f34d13a008811deb2aa5da86f3df SHA-256: 9ff8a156453ef82e76778b5708e523eb425cf94f3bd5599888253438affe4837
120 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, pointing to 'https://ttraff.ru/pify?keyword=amartya+sen+biography+pdf'. This URL is presented within the document body, suggesting a lure to trick users into clicking it. The PDF also contains a large number of external links, many hosted on Shopify, which is flagged as a link farm. The primary malicious IOC is the redirector URL.

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=amartya+sen+biography+pdf
    • http://files.teresele.com/uploads/1/3/2/3/132302735/f67ec2f27014de6.pdf
    • http://files.mismacounsellingservice.com/uploads/1/3/1/6/131636655/c7982c8.pdf
    • http://files.assurancetrainers.com/uploads/1/3/1/3/131384300/49141f6a8c583.pdf
    • http://files.hawaiihomeschoolnetwork.com/uploads/1/3/1/8/131856353/sudazo.pdf
    • http://leruluja.gnshs-pto.org/uploads/1/3/1/0/131070711/mosazekalutisegot.pdf
    • https://cdn.shopify.com/s/files/1/0431/1410/2941/files/81368393225.pdf
    • https://cdn.shopify.com/s/files/1/0433/3853/0965/files/32225204936.pdf
    • https://cdn.shopify.com/s/files/1/0438/0862/0701/files/import_json_file_javascript.pdf
    • https://cdn.shopify.com/s/files/1/0432/8413/6086/files/muzujitinelaja.pdf
    • https://cdn.shopify.com/s/files/1/0430/2353/2195/files/menschen_a1_2_arbeitsbuch_download.pdf
    • https://cdn.shopify.com/s/files/1/0431/7321/6412/files/92341400278.pdf
    • https://cdn.shopify.com/s/files/1/0435/1790/3003/files/97420929462.pdf
    • https://cdn.shopify.com/s/files/1/0439/4106/8958/files/nuwepadasotumezezuzemudo.pdf
    • https://cdn.shopify.com/s/files/1/0435/3287/7976/files/woxaratenemifubutovelek.pdf
    • https://cdn.shopify.com/s/files/1/0434/1337/3084/files/85375112444.pdf
    • https://cdn.shopify.com/s/files/1/0434/7160/1817/files/rewixujubazepol.pdf
    • https://cdn.shopify.com/s/files/1/0439/0033/8331/files/dezolivopojoxupexelufafi.pdf
    • https://cdn.shopify.com/s/files/1/0428/9023/1974/files/anterior_approach_hip_replacement_precautions.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_off0000e8f3.bin
ef9014c53fba7f92f41eec90d5bbc95fd997f2e0ef2064776a4c777b9f93a0ba
pdf-font-stream PDF embedded font (sfnt) at offset 0xE8F3 5652 bytes
font_01_sfnt_off0000fc01.bin
073f6b7cdcfc245bfd3ae94e8c2dc5fcd702cdba3229944eb93f6e62296174ac
pdf-font-stream PDF embedded font (sfnt) at offset 0xFC01 5052 bytes
font_02_sfnt_off00010c9c.bin
2b76930266f83b44c5e63f0e995fa155ec2c45a50c00ca74b29c0b6431d42aa2
pdf-font-stream PDF embedded font (sfnt) at offset 0x10C9C 11780 bytes