Malicious PDF — malware analysis report

Static analysis result for SHA-256 e4d5599a7d667473…

MALICIOUS

PDF

46.3 KB Created: 2020-08-09 06:22:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a02a5e4a22e7fbbff9240fae3eb29100 SHA-1: e7b2fb6a5dffb8463d752dfed7ea64df7ecbe4ef SHA-256: e4d5599a7d667473f5bbcb93d58f33b1220df7427e81092a8603a87431db060f
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a redirector service. The primary malicious URL identified is ttraff.ru, which is flagged as a malicious redirector. The document body, though heavily obfuscated, contains references to marketing and PDF content, likely serving as a lure. The ML classifier strongly indicates 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=marketing+pdf+for+secondary+school
    • http://zumala.lamotteviolins.com/uploads/1/3/2/7/132710712/vumuxajanidami.pdf
    • http://zokatokoj.affordablestoragebrownfield.com/uploads/1/3/1/4/131407469/d2fb0963fe222.pdf
    • http://rajefuza.3realms.ca/uploads/1/3/1/0/131070792/vasudelawis.pdf
    • https://cdn.shopify.com/s/files/1/0431/4713/3088/files/metapafimubidugadadafel.pdf
    • https://cdn.shopify.com/s/files/1/0437/2905/9989/files/danadebitogib.pdf
    • https://cdn.shopify.com/s/files/1/0431/2177/0656/files/18182598448.pdf
    • https://cdn.shopify.com/s/files/1/0428/5412/1635/files/buveraresobo.pdf
    • https://cdn.shopify.com/s/files/1/0431/5080/3099/files/xabinemifelinewesobo.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/86399573169.pdf
    • https://cdn.shopify.com/s/files/1/0435/0679/4656/files/effects_of_hyperinflation_in_zimbabwe.pdf
    • https://cdn.shopify.com/s/files/1/0433/3672/8735/files/take_a_shot_for_me_lyrics.pdf
    • https://cdn.shopify.com/s/files/1/0431/3199/4280/files/kakenuzipogatemolojiw.pdf
    • https://cdn.shopify.com/s/files/1/0433/2378/5370/files/guwajoxuna.pdf
    • https://cdn.shopify.com/s/files/1/0429/7526/4919/files/88654587145.pdf
    • https://cdn.shopify.com/s/files/1/0430/1350/5185/files/how_to_make_a_enderman_farm.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_off000067ea.bin
37aaf3f89df14b260fed3eac9354fd03bb53921e92ab2d7196dc9c3f15c1b58c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x67EA 5376 bytes
font_01_sfnt_off00007a3d.bin
8c2162cdbd95ea87af1258f3ab33ea667c82b6959dc7370107de2b9c9ea4540b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A3D 10536 bytes
font_02_sfnt_off00009e3e.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9E3E 4324 bytes

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