Malicious PDF — malware analysis report

Static analysis result for SHA-256 35487abedd0d54ad…

MALICIOUS

PDF

45.4 KB Created: 2020-08-19 02:06:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b88b85e88830aef37942a6374bc47f1a SHA-1: 764e6e8e89e85fdf609eeec3039a7ab1675841ea SHA-256: 35487abedd0d54ad8d0cea6d6ad414b6ce4c1830fd345defd5c1c944b939ef8b
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://ttraff.com/pify?keyword=calisthenic+workouts+pdf'. Additionally, it exhibits a PDF link farm pattern, embedding numerous external links, many of which are hosted on Shopify. The ML classifier strongly flagged this PDF as malicious. The document body contains obfuscated text and the malicious URL, suggesting a phishing or redirection attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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=calisthenic+workouts+pdf
    • http://files.robinlayne.ca/uploads/1/3/1/4/131453329/wusumujupixemutut.pdf
    • http://files.shaltmira.com/uploads/1/3/0/7/130738933/gakolape.pdf
    • http://files.veronicawolfeartist.com/uploads/1/3/0/7/130776775/3384feb3b.pdf
    • http://files.brickbybrickfitness.com/uploads/1/3/0/9/130969656/pevifovejalegu.pdf
    • https://cdn.shopify.com/s/files/1/0435/4804/9572/files/livro_epidemiologia_gordis.pdf
    • https://cdn.shopify.com/s/files/1/0427/7121/8588/files/wupamajemodobetujiwiwu.pdf
    • https://cdn.shopify.com/s/files/1/0433/5560/3094/files/algebra_2_final_exam.pdf
    • https://cdn.shopify.com/s/files/1/0439/0833/3736/files/uba_aptitude_test_questions.pdf
    • https://cdn.shopify.com/s/files/1/0433/8765/0211/files/95166128279.pdf
    • https://cdn.shopify.com/s/files/1/0434/1478/2104/files/vomukozapilufofi.pdf
    • https://cdn.shopify.com/s/files/1/0436/9969/9866/files/vemevetagajuvelififodivu.pdf
    • https://cdn.shopify.com/s/files/1/0437/2407/9254/files/management_information_system_laudon.pdf
    • https://cdn.shopify.com/s/files/1/0430/9480/2583/files/bakobixukipur.pdf
    • https://cdn.shopify.com/s/files/1/0440/3150/8645/files/parufibuxipekafomomasumu.pdf
    • https://cdn.shopify.com/s/files/1/0437/8873/0525/files/xawanijowinuxenaveruz.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_off00006721.bin
c45e735df4756b4cc98d019eed96a88a61255624a759a67439095ae093a6286e
pdf-font-stream PDF embedded font (sfnt) at offset 0x6721 5304 bytes
font_01_sfnt_off0000792c.bin
dc68059eb05743278358e627e14518113a567dab1accb2f1117aa3ca1b98f8a8
pdf-font-stream PDF embedded font (sfnt) at offset 0x792C 9852 bytes
font_02_sfnt_off00009ad8.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378
pdf-font-stream PDF embedded font (sfnt) at offset 0x9AD8 4324 bytes