Malicious PDF — malware analysis report

Static analysis result for SHA-256 d6e9ab21b8cc3acd…

MALICIOUS

PDF

42.0 KB Created: 2020-08-23 01:33:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 896010ba0b877a783d6fa232e6072bd2 SHA-1: 36023e6d6aaabd15fea567ed06c41d58b5aaf1dc SHA-256: d6e9ab21b8cc3acdead7453256cdee60b2be0ea01fbf53016f36137d40c551b9
120 Risk Score

Malware Insights

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

The PDF file contains multiple embedded links, with a critical heuristic firing indicating a malicious redirector. One of the primary links, 'https://ttraff.com/pify?keyword=prognosis+bronkopneumonia+pdf', points to known malicious infrastructure. The document body, though heavily obfuscated, contains this URL, suggesting an attempt to lure the user to a malicious site under the guise of providing a PDF document. The presence of numerous links to Shopify domains, some of which are confirmed benign, serves as a camouflage for the malicious redirector.

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=prognosis+bronkopneumonia+pdf
    • http://files.aviperry.org/uploads/1/3/2/6/132682168/kokazofibuwi_mafuzukater_wugixekenupeg.pdf
    • http://mopozizuj.americanhomerealtyinc.us/uploads/1/3/0/9/130969191/67f569e.pdf
    • http://files.aprilwahl.org/uploads/1/3/1/6/131637362/veponuraxidamikekibo.pdf
    • http://files.wavehogsurfshop.com/uploads/1/3/1/1/131163601/terikefejidibe.pdf
    • http://files.umcofmacedonia.org/uploads/1/3/1/1/131164016/9162366.pdf
    • https://cdn.shopify.com/s/files/1/0429/6274/7548/files/17173020092.pdf
    • https://cdn.shopify.com/s/files/1/0427/9920/2467/files/long_and_short_worksheets.pdf
    • https://cdn.shopify.com/s/files/1/0430/9804/6621/files/laledefagexasunofenavag.pdf
    • https://cdn.shopify.com/s/files/1/0431/9897/2066/files/burozukuvetajonujazam.pdf
    • https://cdn.shopify.com/s/files/1/0433/2371/9845/files/wefikab.pdf
    • https://cdn.shopify.com/s/files/1/0434/3224/7457/files/brooks_guide_rails_technology.pdf
    • https://cdn.shopify.com/s/files/1/0429/7788/6367/files/22039387657.pdf
    • https://cdn.shopify.com/s/files/1/0440/7685/9557/files/ahmad_shah_abdali_book.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_off000065b5.bin
e6faa41f991d371a072a97f3d055f23b20f4cceb0d719fb815e052e648bcaac7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x65B5 5536 bytes
font_01_sfnt_off00007862.bin
39726c04fdbce64eb7e87bd61af6ae48108a0d11afa8feb6002daa18298b5423		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7862 10280 bytes

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