Malicious PDF — malware analysis report

Static analysis result for SHA-256 a9bf6dbe19cdd9a7…

MALICIOUS

PDF

42.8 KB Created: 2020-08-07 18:56:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5b56daa0ff81f5f2a87f204144069719 SHA-1: 964168e3f3f71b041b30e71d5918fd2a868c4f84 SHA-256: a9bf6dbe19cdd9a7323f073cc0b145dbfdb89e5903f4ade7636d0b059150306b
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1200 Hardware Add-in T1059.001 PowerShell

The PDF file contains numerous embedded links, many of which point to a link farm hosted on Shopify. One critical heuristic identified a malicious redirector link to 'ttraff.com', which is likely used to obscure the final malicious destination. The document body, though heavily obfuscated, contains the same malicious URL, suggesting the primary intent is to lure the user to click on this link. No scripts were extracted from this sample.

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.com/pify?keyword=understanding+pathophysiology+canadian+edition+pdf
    • http://vuvud.ollettbicyclecoaching.com/uploads/1/3/2/7/132740435/bowix.pdf
    • http://mekasuvak.eam-studio.com/uploads/1/3/2/6/132681670/nemifuwufoz_bolalirofafu.pdf
    • http://tajikoxe.spcottermusic.com/uploads/1/3/0/8/130813834/5540684.pdf
    • https://cdn.shopify.com/s/files/1/0434/5934/6582/files/xojelidaw.pdf
    • https://cdn.shopify.com/s/files/1/0438/7205/9547/files/barukelijategobokilukudux.pdf
    • https://cdn.shopify.com/s/files/1/0436/0273/9363/files/zoluduv.pdf
    • https://cdn.shopify.com/s/files/1/0435/4496/9367/files/nolitanajafikuxutu.pdf
    • https://cdn.shopify.com/s/files/1/0440/1725/4558/files/13821748055.pdf
    • https://cdn.shopify.com/s/files/1/0438/4977/7312/files/jirukesonimadurab.pdf
    • https://cdn.shopify.com/s/files/1/0435/7832/7203/files/audiovisual_translation_subtitling_diaz_cintas.pdf
    • https://cdn.shopify.com/s/files/1/0440/6971/6118/files/xijufufebobujox.pdf
    • https://cdn.shopify.com/s/files/1/0433/5819/1768/files/24873899377.pdf
    • https://cdn.shopify.com/s/files/1/0435/2684/8661/files/basekemigalituw.pdf
    • https://cdn.shopify.com/s/files/1/0429/1241/5911/files/rengar_build_jungle.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/78539107281.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_off00005aa6.bin
0fc406008fbfb814aa1c84c0e5371514d2cea7c3629e1745459060022347679b
pdf-font-stream PDF embedded font (sfnt) at offset 0x5AA6 5296 bytes
font_01_sfnt_off00006ca2.bin
8c1224d0178085b3bdcb41989c740fa073635c6dadda7edbb5958461d6be8442
pdf-font-stream PDF embedded font (sfnt) at offset 0x6CA2 10380 bytes
font_02_sfnt_off00008ff3.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e
pdf-font-stream PDF embedded font (sfnt) at offset 0x8FF3 4324 bytes