Malicious PDF — malware analysis report

Static analysis result for SHA-256 3c541b308ff8b3b5…

MALICIOUS

PDF

43.6 KB Created: 2020-08-04 21:19:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b6ca4d4fdbd660f649d1ce6f82ffc6ee SHA-1: 191fae73c2785f82d9b99794447975d8ec56904e SHA-256: 3c541b308ff8b3b53bcae63be2a7af47e5577fd883b8c1a33e6fc388aad235cf
150 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with many links pointing to PDF files hosted on Shopify. The primary malicious indicator is a redirector URL, "https://ttraff.cc/pify?keyword=jquery+ajax+get+download+pdf", which is designed to lead users to malicious content. The document body, though heavily obfuscated, contains references to "Jquery ajax get download pdf" and the wkhtmltopdf tool, suggesting a lure to download further malicious content. 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=jquery+ajax+get+download+pdf
    • http://files.sassyknitsbysherrard.com/uploads/1/3/1/4/131452878/vidaxom-rutet.pdf
    • http://mikap.cupofcomms.com/uploads/1/3/1/1/131164239/9377966.pdf
    • http://files.love2giftembroidery.com/uploads/1/3/1/3/131380741/madixekiwoloxud.pdf
    • http://files.ipimages.com/uploads/1/3/0/7/130740524/bubagetududegelan.pdf
    • http://files.parosclassicalpianofestival.org/uploads/1/3/2/6/132695633/jeguvujutiruwozumadi.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/81603963226.pdf
    • https://cdn.shopify.com/s/files/1/0431/6535/2095/files/15922589584.pdf
    • https://cdn.shopify.com/s/files/1/0433/8352/1445/files/rupagopaxoporifirada.pdf
    • https://cdn.shopify.com/s/files/1/0437/8581/4173/files/wodasodof.pdf
    • https://cdn.shopify.com/s/files/1/0435/3500/7893/files/vunemejenajafo.pdf
    • https://cdn.shopify.com/s/files/1/0431/3251/8549/files/14158912168.pdf
    • https://cdn.shopify.com/s/files/1/0431/4670/7104/files/rockler_adirondack_chair_plans.pdf
    • https://cdn.shopify.com/s/files/1/0432/2269/6098/files/pibanafotesuwosul.pdf
    • https://cdn.shopify.com/s/files/1/0429/3486/1991/files/23795329524.pdf
    • https://cdn.shopify.com/s/files/1/0429/3237/1622/files/fejaruvapilurabakoz.pdf
    • https://cdn.shopify.com/s/files/1/0429/6582/7747/files/fire_works_animated_gif.pdf
    • https://cdn.shopify.com/s/files/1/0438/8097/2456/files/54341366.pdf
    • https://cdn.shopify.com/s/files/1/0437/5802/6903/files/zonulobusasowazisewo.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_off0000664c.bin
710a0c5a272f97a9c6603e791452be3179c43de1dc674359a0508aa6a20dfa2a
pdf-font-stream PDF embedded font (sfnt) at offset 0x664C 5484 bytes
font_01_sfnt_off00007926.bin
2dd964c1c0eee3cd89a45c25b0145aa3321fc7332de3950dc58f07dc0438cdc7
pdf-font-stream PDF embedded font (sfnt) at offset 0x7926 12136 bytes