Malicious PDF — malware analysis report

Static analysis result for SHA-256 511dbd564960c9b2…

MALICIOUS

PDF

43.1 KB Created: 2020-08-16 20:30:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9a8e93b0466f05448164072cfb2df050 SHA-1: 54c58f05d233b56f5597f30278bf599aa73a3998 SHA-256: 511dbd564960c9b292a7fa6bf81af87e3b5517bde753473eae3b24f4cde04742
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous links, including one pointing to a known malicious redirector. The document body text, though garbled, contains the phrase 'Form to apply for passport online', suggesting a lure. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' confirms the presence of a malicious link, and 'PDF_SEO_LINK_FARM' indicates a large number of outbound links, typical of SEO poisoning or link farm abuse. The ML classifier also strongly flagged this PDF as malicious.

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=form+to+apply+for+passport+online
    • http://files.jucierdos.com/uploads/1/3/0/9/130969083/7824208.pdf
    • http://fosawenu.cantyschool.org/uploads/1/3/1/4/131406153/velos.pdf
    • http://mujos.marciabartusiak.com/uploads/1/3/1/1/131164250/getedujaj.pdf
    • http://files.divaandmeproductionsinc.org/uploads/1/3/1/6/131607712/luzobapuxofa.pdf
    • https://cdn.shopify.com/s/files/1/0428/2672/7580/files/brche_subtrahieren_bungen.pdf
    • https://cdn.shopify.com/s/files/1/0440/3573/5717/files/86402904321.pdf
    • https://cdn.shopify.com/s/files/1/0434/4581/3413/files/83500160870.pdf
    • https://cdn.shopify.com/s/files/1/0434/8978/8069/files/ipad_write_on_with_stylus.pdf
    • https://cdn.shopify.com/s/files/1/0437/2915/8295/files/lasofotedixufalukezite.pdf
    • https://cdn.shopify.com/s/files/1/0430/3775/3501/files/8255964920.pdf
    • https://cdn.shopify.com/s/files/1/0427/5381/8790/files/antonyms_and_synonyms_list_with_meaning_in_telugu.pdf
    • https://cdn.shopify.com/s/files/1/0427/5961/8716/files/75702533054.pdf
    • https://cdn.shopify.com/s/files/1/0432/5425/1670/files/vagixuxe.pdf
    • https://cdn.shopify.com/s/files/1/0428/5526/8519/files/sleeping_dogs_apartment_upgrades.pdf
    • https://cdn.shopify.com/s/files/1/0431/2036/1629/files/gekokujo_character_creation.pdf
    • https://cdn.shopify.com/s/files/1/0439/3123/8555/files/vawadew.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_off00005dc6.bin
ea5c4bfdff3b99611960bca85b8a124c134a5ff5fee296711e38f559c814757b
pdf-font-stream PDF embedded font (sfnt) at offset 0x5DC6 4892 bytes
font_01_sfnt_off00006e4c.bin
0c41c3f2082ce9eedbafa9c704de462bd9120d6eab0caf79398fd22090f9bd43
pdf-font-stream PDF embedded font (sfnt) at offset 0x6E4C 10272 bytes
font_02_sfnt_off00009176.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333
pdf-font-stream PDF embedded font (sfnt) at offset 0x9176 4324 bytes