Malicious PDF — malware analysis report

Static analysis result for SHA-256 c35c779ccafbe69c…

MALICIOUS

PDF

41.6 KB Created: 2020-08-09 00:13:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d97a79fb2f6ac5f0252f2c396d3c25f9 SHA-1: 7cced7d75a6162b0b478c2da475d8e8bd6188128 SHA-256: c35c779ccafbe69c67e32167ef4fb4513d92f073ac78143939dd8c0b724bb64c
180 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to Shopify domains, but one critical link directs to a known malicious redirector. The document body also explicitly requests sensitive recovery information, a common social engineering tactic. The presence of a malicious redirector and the lure for recovery secrets strongly suggest a phishing or credential harvesting attempt.

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.
  • Recovery secret / private key request critical SE_SECRET_RECOVERY_LURE
    Document requests recovery phrases, private keys, backup codes, or saved passwords. Requests for these secrets in a document are high-risk.
  • 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=break+the+chain+of+infection+pdf
    • http://files.coffeebaseball.com/uploads/1/3/0/9/130969598/2882199.pdf
    • http://files.tilttrucksaccessories.com/uploads/1/3/0/7/130739783/8523554.pdf
    • http://files.atylerholmanproject.com/uploads/1/3/1/4/131452958/watamopijatuxipin.pdf
    • https://cdn.shopify.com/s/files/1/0429/6772/8279/files/wunepajifukogoba.pdf
    • https://cdn.shopify.com/s/files/1/0431/6200/9755/files/54954124591.pdf
    • https://cdn.shopify.com/s/files/1/0435/6725/1615/files/8th_grade_vocabulary_words.pdf
    • https://cdn.shopify.com/s/files/1/0430/7153/7301/files/10_medicinal_plants_and_their_uses.pdf
    • https://cdn.shopify.com/s/files/1/0433/6808/7701/files/aprender_aleman_7_dias.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/9284441163.pdf?v=1594212706
    • https://cdn.shopify.com/s/files/1/0435/5696/2467/files/games_like_ourworld.pdf
    • https://cdn.shopify.com/s/files/1/0431/4782/1212/files/luvituzonodadobisonuboke.pdf
    • https://cdn.shopify.com/s/files/1/0428/2348/3548/files/27765440668.pdf
    • https://cdn.shopify.com/s/files/1/0434/3159/2092/files/scotts_rotary_spreader.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_off0000668c.bin
e5b3526d99aff9d11f07dce153c09be4ce6c36c584e7e1f3bb4d66b8136809e3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x668C 5148 bytes
font_01_sfnt_off00007810.bin
d99cbaeb0ef087f5faa572476028f83271d6073deddce02926c250614ee496e4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7810 9964 bytes

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