Malicious PDF — malware analysis report

Static analysis result for SHA-256 bb1f6879636f35b3…

MALICIOUS

PDF

56.8 KB Created: 2020-08-07 23:33:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5ee4fda7a7fdfbbfbccffb7d2dda7bd1 SHA-1: f962d3433cc2f4ab2336f0a2e6051c50eaeb31cf SHA-256: bb1f6879636f35b3a41571ef1f56182b41f7bce50781a002b8242dc9c32f0aa5
120 Risk Score

Malware Insights

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

The PDF contains a link farm designed to mimic search results for a dictionary download, with the primary link leading to a known malicious redirector. The document body, though partially corrupted, contains the target URL and other links, suggesting a social engineering attempt to trick users into visiting malicious sites. No scripts were extracted, and the primary threat is the redirection to malicious infrastructure.

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=longman+dictionary+contemporary+english+free+download+pdf
    • http://files.learningladderduxburyvt.net/uploads/1/3/0/8/130813357/9318818.pdf
    • http://files.alaskazooarch.org/uploads/1/3/2/6/132680796/finupexo.pdf
    • http://muginokel.thelancerfoundation.com/uploads/1/3/1/3/131379578/suxujo-gisovituji-vuzuwidi-vazovuza.pdf
    • https://cdn.shopify.com/s/files/1/0437/0894/0441/files/asbaab_an_nuzool.pdf
    • https://cdn.shopify.com/s/files/1/0446/9784/5913/files/all_railway_station_code.pdf
    • https://cdn.shopify.com/s/files/1/0437/3626/8949/files/verizon_kyocera_flip_phone_manual.pdf
    • https://cdn.shopify.com/s/files/1/0434/9244/2264/files/dorivapowebagagarejulivi.pdf
    • https://cdn.shopify.com/s/files/1/0434/2402/2690/files/29682130899.pdf
    • https://cdn.shopify.com/s/files/1/0440/8786/9592/files/wuzotijezazapodunod.pdf
    • https://cdn.shopify.com/s/files/1/0433/4393/7690/files/45890458737.pdf
    • https://cdn.shopify.com/s/files/1/0430/6645/8265/files/netidusi.pdf
    • https://cdn.shopify.com/s/files/1/0429/4131/7276/files/18307410874.pdf
    • https://cdn.shopify.com/s/files/1/0434/9103/3250/files/ludubopora.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_off00006a67.bin
3c70fa2c031098b298c3959473b2c1b17671c09cff98ee859246b41205d97cd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A67 12960 bytes
font_01_sfnt_off00009457.bin
ac56dd0b3714070b2dd49c6ff6df07decd2124b4164f2e3a8a91336aeb1063d0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9457 5704 bytes
font_02_sfnt_off0000a7af.bin
ac2d6936cb352e080612b0b96658d15e73d564cbdbfad3e4e23138cc6d4059fe		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA7AF 14780 bytes

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