Malicious PDF — malware analysis report

Static analysis result for SHA-256 aff1223ff5540de3…

MALICIOUS

PDF

39.1 KB Created: 2020-08-16 20:55:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 34402aa4ffe85898dc59f4179f164766 SHA-1: f3c5a85a3fbbfd48c0105a3d15731f1706aafb7e SHA-256: aff1223ff5540de3e3709a97977cc01ce8de457615b3df85b58763dd57e9e5c1
152 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links, with one identified as a malicious redirector. The ML classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, contains the URL 'https://ttraff.ru/pify?keyword=spider+man+ps4++ppsspp', which is likely the primary malicious destination. The presence of numerous shopify.com links suggests an attempt to blend in with benign content while masking the malicious intent.

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.ru/pify?keyword=spider+man+ps4++ppsspp
    • http://files.matdube.com/uploads/1/3/1/4/131483138/taneju.pdf
    • https://cdn.shopify.com/s/files/1/0436/5756/0217/files/change_scanned_to_word_online.pdf
    • https://cdn.shopify.com/s/files/1/0428/8941/2764/files/pisciculture_gratuit.pdf
    • https://cdn.shopify.com/s/files/1/0431/3550/0439/files/61516591850.pdf
    • https://cdn.shopify.com/s/files/1/0433/7460/8545/files/mijelarew.pdf
    • https://cdn.shopify.com/s/files/1/0432/1722/3840/files/sivofufumujovupal.pdf
    • https://cdn.shopify.com/s/files/1/0430/6662/2105/files/widinavatazagewexanijixig.pdf
    • https://cdn.shopify.com/s/files/1/0429/2381/9164/files/59004432232.pdf
    • https://cdn.shopify.com/s/files/1/0431/1610/1793/files/asciidoctor_page_break.pdf
    • https://cdn.shopify.com/s/files/1/0428/2476/1507/files/535035237.pdf
    • https://cdn.shopify.com/s/files/1/0435/2675/0357/files/74326065805.pdf
    • https://cdn.shopify.com/s/files/1/0429/7365/9290/files/58920079495.pdf
    • https://cdn.shopify.com/s/files/1/0436/1653/4690/files/61158786006.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_off00004544.bin
272bce94ae3ce011cf06f661ff57372fbafb6abbc52834fe6e9ca2a327609f43
pdf-font-stream PDF embedded font (sfnt) at offset 0x4544 5264 bytes
font_01_sfnt_off00005713.bin
f7f9aaf39cb771b5e05ac9b6fd46f5c35f6d905072f808adf9e8021e087eb772
pdf-font-stream PDF embedded font (sfnt) at offset 0x5713 10244 bytes
font_02_sfnt_off00007a3e.bin
9c47a8ecf7103172530608de19fa11afb8a035ab51042e9cb8c6809f09ebb189
pdf-font-stream PDF embedded font (sfnt) at offset 0x7A3E 16344 bytes