Malicious PDF — malware analysis report

Static analysis result for SHA-256 43058833142e8aee…

MALICIOUS

PDF

42.6 KB Created: 2020-08-18 14:42:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cfeb0c0cf8b0bd3cfad27e6e2c9dd54c SHA-1: 29bb7e3a414cc9d31ad24a1ada624ee9c164e4b6 SHA-256: 43058833142e8aeeee21e4dd17fd0824963800ff5f3cccf3145051782808c1c9
152 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, with a critical heuristic firing for a malicious redirector link to 'ttraff.com'. The document body, though heavily obfuscated, also contains this URL and numerous other links hosted on 'cdn.shopify.com' and other domains, suggesting a link farm or redirection strategy. The ML classifier strongly indicates maliciousness, supporting the conclusion that this PDF is designed to lure users to malicious sites.

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.com/pify?keyword=assessment+vs+evaluation+pdf
    • http://files.uniteoffshore.net/uploads/1/3/1/0/131070846/wimikawigaxuwe_bodavigir_vejibejovosewu.pdf
    • http://betep.jamesharriman.co.uk/uploads/1/3/2/6/132682787/6156962.pdf
    • http://files.bonafidefiction.com/uploads/1/3/1/4/131411539/fofukovu-naboku-kadivuvavewir.pdf
    • http://rorevi.museumonmain.org/uploads/1/3/2/8/132814930/520351.pdf
    • https://cdn.shopify.com/s/files/1/0434/7772/9442/files/rokok.pdf
    • https://cdn.shopify.com/s/files/1/0433/9928/2845/files/airmen_result_02_2020.pdf
    • https://cdn.shopify.com/s/files/1/0433/6356/5727/files/23900725091.pdf
    • https://cdn.shopify.com/s/files/1/0435/5417/7185/files/dokepekisuzipijapifilo.pdf
    • https://cdn.shopify.com/s/files/1/0437/8856/6677/files/srs_premium_sound.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/wexidemunuviviradepinitim.pdf
    • https://cdn.shopify.com/s/files/1/0430/1901/0201/files/5173870978.pdf
    • https://cdn.shopify.com/s/files/1/0428/2161/5775/files/80797401640.pdf
    • https://cdn.shopify.com/s/files/1/0435/9582/5320/files/topic_about_afghanistan_history.pdf
    • https://cdn.shopify.com/s/files/1/0432/5244/9435/files/94878479097.pdf
    • https://cdn.shopify.com/s/files/1/0432/5064/7204/files/12685580671.pdf
    • https://cdn.shopify.com/s/files/1/0431/0689/3985/files/switch_live_stream.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006968.bin
212bd13ddcc04e5b8b8901bb15a9bffeb1811cb2c2d72bd7f0787204a5c7ca78
pdf-font-stream PDF embedded font (sfnt) at offset 0x6968 5140 bytes
font_01_sfnt_off00007ade.bin
64da4e21d4be7f03c1bc37fd9c8fa3eae3c6ee7253d4bb618bdf05410e6172e9
pdf-font-stream PDF embedded font (sfnt) at offset 0x7ADE 10224 bytes