Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e3571e38999b71c…

MALICIOUS

PDF

41.1 KB Created: 2020-08-18 16:56:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9c34b3caa4f8f9dcc86451e512db79c3 SHA-1: f562eae8a160c2437262511783f576cf3d38bdb6 SHA-256: 2e3571e38999b71c8d0196afffa13e22f4b3777454765814f9b0d7b8733d6fb2
150 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to Shopify domains, but one critical link directs to a known malicious redirector. This suggests a link farm attack designed to obscure the ultimate destination and potentially lead users to malicious content. The ML classifier also strongly indicated maliciousness.

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=calligraphy+arabic+fonts+free
    • http://files.caasfepconference2020.org/uploads/1/3/0/7/130775085/c1bf25250a.pdf
    • https://cdn.shopify.com/s/files/1/0437/9928/1821/files/john_waite_missing_you_lyrics.pdf
    • https://cdn.shopify.com/s/files/1/0432/7125/8278/files/tobavolavud.pdf
    • https://cdn.shopify.com/s/files/1/0431/9431/9009/files/93670143157.pdf
    • https://cdn.shopify.com/s/files/1/0432/4330/7175/files/memento_mori_gratis.pdf
    • https://cdn.shopify.com/s/files/1/0432/8282/5371/files/calendar_june_2020_printable.pdf
    • https://cdn.shopify.com/s/files/1/0431/0417/4233/files/grand_arena_swgoh.pdf
    • https://cdn.shopify.com/s/files/1/0437/9390/7869/files/44464161304.pdf
    • https://cdn.shopify.com/s/files/1/0431/8615/9767/files/delumet.pdf
    • https://cdn.shopify.com/s/files/1/0435/0866/2440/files/13389909790.pdf
    • https://cdn.shopify.com/s/files/1/0434/6878/3768/files/92607762432.pdf
    • https://cdn.shopify.com/s/files/1/0437/5347/2151/files/reasons_for_absenteeism_in_the_workplace.pdf
    • https://cdn.shopify.com/s/files/1/0428/8767/6063/files/tagutonowetanovabadapoza.pdf
    • https://cdn.shopify.com/s/files/1/0430/4656/8098/files/zatevoloz.pdf
    • https://cdn.shopify.com/s/files/1/0434/8418/4728/files/betenatadep.pdf
    • https://cdn.shopify.com/s/files/1/0431/4189/0209/files/problems_on_ages_shortcuts_tricks_in_tamil.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_off00006429.bin
53b8ad960ceb8f6a8b02e4b73d302e202c7fadc25f863537dd5588d325ac1eee		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6429 5424 bytes
font_01_sfnt_off0000769e.bin
d057bc9ecef22af42f8c954d0f5f4d9c3d4af9fa98d08cdecc5feefa61cb7d09		 pdf-font-stream PDF embedded font (sfnt) at offset 0x769E 9636 bytes

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