Malicious PDF — malware analysis report

Static analysis result for SHA-256 8f54e9dd38995802…

MALICIOUS

PDF

59.8 KB Created: 2020-08-07 20:11:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6dfa994d426a23dd0ad5296091e295ab SHA-1: 1a273957042276ef21f128520533345eb576e904 SHA-256: 8f54e9dd389958024dc7746df9f0c9933108d0605c27984cbc2031bcbd4b9ab4
120 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, a common tactic for SEO spam and phishing. One critical heuristic identified a link to a known malicious redirector, ttraff.cc, which is used to obscure the final destination. The document body, though heavily obfuscated, contains the same URL, suggesting it's the primary lure. The presence of many Shopify links suggests a link farm used to boost search engine rankings for malicious content.

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=addition+and+subtraction+fractions+worksheets+pdf
    • http://files.castleextermination.com/uploads/1/3/1/3/131382330/47dc0cbc423.pdf
    • http://files.gcsebusiness.com/uploads/1/3/0/8/130874352/2454969.pdf
    • http://parafur.elephantsinthecoffee.com/uploads/1/3/1/8/131856698/zeliroxupikigigotag.pdf
    • https://cdn.shopify.com/s/files/1/0430/3316/5986/files/38669671632.pdf
    • https://cdn.shopify.com/s/files/1/0434/0023/3112/files/45187781005.pdf
    • https://cdn.shopify.com/s/files/1/0434/6108/3301/files/accountant_responsibilities.pdf
    • https://cdn.shopify.com/s/files/1/0428/8974/0441/files/44248428101.pdf
    • https://cdn.shopify.com/s/files/1/0432/9324/5600/files/scholarship_affidavit_format.pdf
    • https://cdn.shopify.com/s/files/1/0431/6299/2795/files/suwelagukokemofidoxup.pdf
    • https://cdn.shopify.com/s/files/1/0439/7708/0990/files/oxford_picture_dictionary_workbook.pdf
    • https://cdn.shopify.com/s/files/1/0430/6662/2106/files/keraxelegexidogijo.pdf
    • https://cdn.shopify.com/s/files/1/0435/1783/7467/files/62370753513.pdf
    • https://cdn.shopify.com/s/files/1/0431/8671/6830/files/bus_topology_advantages_and_disadvantages.pdf
    • https://cdn.shopify.com/s/files/1/0433/3332/0872/files/90710255567.pdf
    • https://cdn.shopify.com/s/files/1/0438/3798/0834/files/bonovomigozube.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008a82.bin
0bf8163f90b03aa42770176170b7f1b5ed176a5696aa4030f71d437aa6056467
pdf-font-stream PDF embedded font (sfnt) at offset 0x8A82 5380 bytes
font_01_sfnt_off00009ccf.bin
0368240da0b71a88d89960aceaa4e8ab8b496c4960795b3063fd4fb2b9918407
pdf-font-stream PDF embedded font (sfnt) at offset 0x9CCF 9712 bytes
font_02_sfnt_off0000be50.bin
64e13322576ebe4b9a20b8efdba1cb2c8bc01163a7c4e1ba1f667a2d7cf8e6df
pdf-font-stream PDF embedded font (sfnt) at offset 0xBE50 16116 bytes
font_03_sfnt_off0000d329.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c
pdf-font-stream PDF embedded font (sfnt) at offset 0xD329 4324 bytes