Malicious PDF — malware analysis report

Static analysis result for SHA-256 e978ac73e7f1480a…

MALICIOUS

PDF

59.2 KB Created: 2020-08-03 06:38:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 54bf41d8f65f10ba1cf43bfcc598d411 SHA-1: 4e4c5f0b4b34feea1a5f947691bfbe12fc50de57 SHA-256: e978ac73e7f1480a2468bde61bdaa40b81bafa3503ff5314e9e0bf90409ddad9
128 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.001 User Execution: Malicious Link T1059.001 PowerShell

The PDF contains multiple embedded links, with a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. Another critical heuristic indicates a PDF link farm, with many links hosted on 'cdn.shopify.com'. The document body, though heavily obfuscated, contains the string 'Flask file upload' and the malicious URL 'https://ttraff.com/pify?keyword=flask+file+upload', suggesting a lure related to file uploads. The presence of a visual download button heuristic further supports a deceptive user interaction pattern. The primary attack vector appears to be directing users to malicious or deceptive web content.

Heuristics 4

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=flask+file+upload
    • http://files.fedexreach.com/uploads/1/3/2/6/132696060/raxononederururag.pdf
    • http://files.dkgwa.org/uploads/1/3/1/1/131164474/6795a6cc8faffd.pdf
    • http://files.pylkkanenconsulting.com/uploads/1/3/2/6/132681352/pavixuramo-sunov-kedogotebuluz.pdf
    • https://cdn.shopify.com/s/files/1/0432/2190/9667/files/jepetuzavogu.pdf
    • https://cdn.shopify.com/s/files/1/0429/5104/9370/files/mowawezevulipevofovejog.pdf
    • https://cdn.shopify.com/s/files/1/0427/8750/4294/files/22521551903.pdf
    • https://cdn.shopify.com/s/files/1/0429/3532/0735/files/nerefapogijewika.pdf
    • https://cdn.shopify.com/s/files/1/0429/6137/1290/files/52734001708.pdf
    • https://cdn.shopify.com/s/files/1/0430/5698/8317/files/super_minecraft_maker.pdf
    • https://cdn.shopify.com/s/files/1/0437/3384/4119/files/52386449663.pdf
    • https://cdn.shopify.com/s/files/1/0428/9147/7148/files/dituv.pdf
    • https://cdn.shopify.com/s/files/1/0432/2390/8520/files/95514805045.pdf
    • https://cdn.shopify.com/s/files/1/0432/4936/9252/files/22594641744.pdf
    • https://cdn.shopify.com/s/files/1/0427/7128/4135/files/4201993945.pdf
    • https://cdn.shopify.com/s/files/1/0434/6108/3301/files/40350395065.pdf
    • https://cdn.shopify.com/s/files/1/0429/4914/8838/files/zarivoxomezuzigo.pdf
    • https://cdn.shopify.com/s/files/1/0431/0017/6544/files/essentials_of_pathophysiology_study_guide.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_off00009dab.bin
9bfcb44cc99728604008901ec7fe1a841580b4d7d1074cd3395918a803090c7a
pdf-font-stream PDF embedded font (sfnt) at offset 0x9DAB 4956 bytes
font_01_sfnt_off0000aea5.bin
e0c5565696cd8193a841b754007f45d07e5ffe8ebf9c032b8f5d5c24fc897518
pdf-font-stream PDF embedded font (sfnt) at offset 0xAEA5 15628 bytes