Malicious PDF — malware analysis report

Static analysis result for SHA-256 d849b890bd5eed84…

MALICIOUS

PDF

65.2 KB Created: 2020-08-23 04:21:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a02717b6a7552c575a988bd77f2f6de1 SHA-1: fc907a03c3817d9f252ee3ca9ad7604136bd04ae SHA-256: d849b890bd5eed849ef6bb214de3239324cb81b73dcb805599b874ffd7300ece
150 Risk Score

Malware Insights

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

The PDF contains numerous links, with a critical heuristic firing for a malicious redirector URL (ttraff.ru). The document body, though heavily obfuscated, contains references to the same malicious URL and benign-looking PDF filenames hosted on Shopify. This suggests a phishing or redirection attempt, likely to deliver a second-stage payload. No scripts were extracted, limiting the ability to determine specific execution or persistence mechanisms.

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.ru/pify?keyword=jquery+ajax+form+submit+with+validation
    • http://files.phemanitoba.ca/uploads/1/3/1/4/131438002/5152560.pdf
    • http://legux.kilmerschool.org/uploads/1/3/1/4/131438177/1939178.pdf
    • https://cdn.shopify.com/s/files/1/0437/4138/0759/files/75851843375.pdf
    • https://cdn.shopify.com/s/files/1/0433/7637/8014/files/raxelutasubedusudosoni.pdf
    • https://cdn.shopify.com/s/files/1/0436/2590/6336/files/sad_shayari_wallpaper_free_hd.pdf
    • https://cdn.shopify.com/s/files/1/0430/1419/3311/files/xukomokesifirakeli.pdf
    • https://cdn.shopify.com/s/files/1/0432/9108/2918/files/git_create_patch_from_commit.pdf
    • https://cdn.shopify.com/s/files/1/0431/4044/8407/files/duzodifixigajoluk.pdf
    • https://cdn.shopify.com/s/files/1/0430/1851/8681/files/desukad.pdf
    • https://cdn.shopify.com/s/files/1/0432/8397/2256/files/fekimijizof.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006bc5.bin
c456c6b346bda684f187e34792540513a9bbb13092f6c22e759025cf028ce80f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6BC5 14252 bytes
font_01_sfnt_off00009a18.bin
fdcfdd4c189b461c87369fe0eaa5758d619ed409436064f881700c1cdbd0ab82		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9A18 5800 bytes
font_02_sfnt_off0000addc.bin
c6fe4869be990458ecb160c5d965c1680ac46ce5855173cb3c7d3eeb3f1bc3cd		 pdf-font-stream PDF embedded font (sfnt) at offset 0xADDC 16076 bytes
font_03_sfnt_off0000e064.bin
e93acd332f5893643511f4cefd38969ad5c744ad1b08842a788b6be7d277dd15		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE064 16204 bytes

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