Malicious PDF — malware analysis report

Static analysis result for SHA-256 ac6b96d5039d4228…

MALICIOUS

PDF

38.3 KB Created: 2020-08-30 13:57:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 851f4b60831cce94e2c06149655c2306 SHA-1: dd634d809fa2f8b9e54a60205cdc015da0dded0b SHA-256: ac6b96d5039d4228dcb39e5a6f7b09d137d06cdcfe49cec28e5482b86b2d486e
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 specific book titles, directing users to a malicious redirector. The primary malicious URL is https://ttraff.ru/wix?keyword=general+organic+and+biochemistry+7th+edition+pdf. While many other URLs point to benign Shopify domains, the presence of the redirector indicates a malicious intent to lead users to harmful content.

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/wix?keyword=general+organic+and+biochemistry+7th+edition+pdf
    • https://cdn.shopify.com/s/files/1/0429/1048/2591/files/jumanji_welcome_to_the_jungle_putlocker.pdf
    • https://cdn.shopify.com/s/files/1/0435/5240/7704/files/technical_communication_11th_edition_download.pdf
    • https://cdn.shopify.com/s/files/1/0431/9546/5892/files/sixopogoralagokekakevuw.pdf
    • https://cdn.shopify.com/s/files/1/0431/0705/7825/files/wunek.pdf
    • https://cdn.shopify.com/s/files/1/0434/1514/2551/files/finite_mathematics_barnett_12th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0433/0936/7461/files/novowavikutupinupowa.pdf
    • https://cdn.shopify.com/s/files/1/0434/9735/7472/files/is300_manual_transmission.pdf
    • https://cdn.shopify.com/s/files/1/0431/9975/8497/files/edexcel_a_level_chemistry_data_booklet.pdf
    • https://cdn.shopify.com/s/files/1/0440/3727/5813/files/70378400671.pdf
    • https://cdn.shopify.com/s/files/1/0434/1055/5041/files/68805522634.pdf
    • https://cdn.shopify.com/s/files/1/0437/5543/8241/files/1348762942.pdf
    • https://cdn.shopify.com/s/files/1/0440/6178/6262/files/upsc_agriculture_optional.pdf
    • https://cdn.shopify.com/s/files/1/0437/1313/4743/files/49462956354.pdf
    • https://static.usrfiles.com/ugd/e32576_9d694b0171eb4e098a758cd7269e4124.pdf
    • https://static.usrfiles.com/ugd/b8c837_57857feb91ca481c9a83f02965e15cfc.pdf
    • https://static.usrfiles.com/ugd/6924eb_d1d6811c459a4317a302cabbaf35c5ac.pdf
    • https://static.usrfiles.com/ugd/b8c837_0c283542dd054f8287c4545160b60715.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_off00004ba7.bin
3a2acc317ddb707c8fe1462dfb80164a5bf89ca59a0254590a6fda7429a70729
pdf-font-stream PDF embedded font (sfnt) at offset 0x4BA7 5924 bytes
font_01_sfnt_off00005fae.bin
a94c2102b4c2b0bd782a1d088fe7f04a9280b6060c6361c20832a98214dbf9c1
pdf-font-stream PDF embedded font (sfnt) at offset 0x5FAE 14252 bytes