Malicious PDF — malware analysis report

Static analysis result for SHA-256 004a76be4688da29…

MALICIOUS

PDF

43.0 KB Created: 2020-08-18 23:48:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 262aa642ca9e9b15575097ea1fc32c89 SHA-1: 79dd2cfd034f47744a2f699ea16208b555536f4f SHA-256: 004a76be4688da29806552e4969c5ad741b730a530563e1aa8bb1e137374a8ee
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF document contains a mass of external links, including a critical redirector link to 'ttraff.cc'. This infrastructure is likely used to distribute further malicious content or phish for user credentials. The embedded URLs suggest a link farm or SEO poisoning tactic to lure unsuspecting users.

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=molecule+compound+element+worksheet
    • http://files.paperandpoppies.com/uploads/1/3/0/9/130969426/depigikudivi.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0430/8126/9401/files/pojuk.pdf
    • https://cdn.shopify.com/s/files/1/0428/9429/5203/files/novekunitijenulogel.pdf
    • https://cdn.shopify.com/s/files/1/0429/6107/6375/files/11198519933.pdf
    • https://cdn.shopify.com/s/files/1/0435/9330/2178/files/45632045535.pdf
    • https://cdn.shopify.com/s/files/1/0433/3669/5959/files/venimaxinipusuxutakopurim.pdf
    • https://cdn.shopify.com/s/files/1/0430/7252/0352/files/berliner_platz_3_download.pdf
    • https://cdn.shopify.com/s/files/1/0428/9540/9311/files/21609632543.pdf
    • https://cdn.shopify.com/s/files/1/0430/5597/2501/files/neural_networks_and_deep_learning_book.pdf
    • https://cdn.shopify.com/s/files/1/0434/7238/8246/files/babudu.pdf
    • https://cdn.shopify.com/s/files/1/0449/0821/6487/files/bionicle_makuta_s_guide_to_the_universe.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005dc5.bin
078c503ae84951ae489d0b805441cb04d554d405faa6e1c0b02ce9750e6b0b26
pdf-font-stream PDF embedded font (sfnt) at offset 0x5DC5 5100 bytes
font_01_sfnt_off00006f01.bin
06d4e3a6bd005260dad822ba67746ff71576ef1b63500fd7ce6aebe23e0ebbda
pdf-font-stream PDF embedded font (sfnt) at offset 0x6F01 10008 bytes
font_02_sfnt_off00009143.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2
pdf-font-stream PDF embedded font (sfnt) at offset 0x9143 4324 bytes