Malicious PDF — malware analysis report

Static analysis result for SHA-256 a332df7071efa9d3…

MALICIOUS

PDF

52.3 KB Created: 2020-08-22 00:00:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0e7a59c673e4a96f47f0c9ecb7d9a145 SHA-1: b976b5e1f6091e793eea9b68c4645260b70f1982 SHA-256: a332df7071efa9d3cef955a2e0702de8ff3b51790b3792a6571f5aced90e7329
152 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.cc/pify?keyword=brochure+size+template+photoshop'. This URL is likely used to lure users into downloading further malware or visiting phishing sites. The document body, though heavily obfuscated, contains references to brochure templates, aligning with the redirector's keyword. The presence of numerous external PDF links, many hosted on cdn.shopify.com, suggests a link farm or SEO poisoning tactic to distribute the malicious PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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=brochure+size+template+photoshop
    • http://girule.lexialearners.com/uploads/1/3/1/6/131606575/viniviwi.pdf
    • https://cdn.shopify.com/s/files/1/0437/1477/3147/files/jetusabiba.pdf
    • https://cdn.shopify.com/s/files/1/0431/4995/1138/files/manual_da_pedaleira_boss_me_25_em_portugues.pdf
    • https://cdn.shopify.com/s/files/1/0431/7439/6058/files/wogiwijozowijen.pdf
    • https://cdn.shopify.com/s/files/1/0431/1603/6257/files/xuvavolojakazefilovizu.pdf
    • https://cdn.shopify.com/s/files/1/0437/7562/3320/files/nixar.pdf
    • https://cdn.shopify.com/s/files/1/0450/2142/9924/files/lubomav.pdf
    • https://cdn.shopify.com/s/files/1/0430/6858/8194/files/download_wondershareelement_for_windows_7.pdf
    • https://cdn.shopify.com/s/files/1/0440/8462/5558/files/transfer_on_death_car_title_texas_form.pdf
    • https://cdn.shopify.com/s/files/1/0427/6797/4556/files/69882929347.pdf
    • https://cdn.shopify.com/s/files/1/0427/5575/2103/files/tazot.pdf
    • https://cdn.shopify.com/s/files/1/0430/3696/7063/files/logudo.pdf
    • https://cdn.shopify.com/s/files/1/0432/7840/1700/files/95564198519.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_off00008163.bin
fdc313b18b06821aec614fdd0f7825db013e292eb5bf6c58582f0d443c895e9f
pdf-font-stream PDF embedded font (sfnt) at offset 0x8163 5048 bytes
font_01_sfnt_off00009295.bin
4ba76a46a159162c4f22a92f41396d6be865c31c4e27eb1787fb14863b8a5859
pdf-font-stream PDF embedded font (sfnt) at offset 0x9295 10544 bytes
font_02_sfnt_off0000b6a7.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333
pdf-font-stream PDF embedded font (sfnt) at offset 0xB6A7 4324 bytes