Malicious PDF — malware analysis report

Static analysis result for SHA-256 95f3e3ad60d7ed2f…

MALICIOUS

PDF

53.4 KB Created: 2020-08-31 05:09:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 196837bb2bb3120e7876add2e2408d20 SHA-1: edb97928a8739d5c939047b94b4b5ab2c0ebdfa3 SHA-256: 95f3e3ad60d7ed2fc8fd9bbee7f35078e1a5cdf737534eaee00978ab99b74e8a
152 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links, with a critical heuristic firing indicating a malicious redirector link. The ML classifier also flagged this PDF with high confidence. The document body contains obfuscated text and multiple URLs, including a primary redirector and a large number of links to Shopify-hosted PDFs, suggesting a link farm or redirection scheme. The primary malicious URL is https://ttraff.com/wix?keyword=%25D1%2581%25D0%25BA%25D0%25B0%25D1%2587%25D0%25B0%25D1%2582%25D1%258C+nekopara+vol+1+18++%25D0%25BD%25D0%25B0+%25D1%2580%25D1%2583%25D1%2581%25D1%2581%25D0%25BA%25D0%25BE, which likely leads to further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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.com/wix?keyword=%25D1%2581%25D0%25BA%25D0%25B0%25D1%2587%25D0%25B0%25D1%2582%25D1%258C+nekopara+vol+1+18++%25D0%25BD%25D0%25B0+%25D1%2580%25D1%2583%25D1%2581%25D1%2581%25D0%25BA%25D0%25BE
    • https://cdn.shopify.com/s/files/1/0434/0688/5031/files/pesofedogape.pdf
    • https://cdn.shopify.com/s/files/1/0429/2627/6775/files/bruckner_locus_iste_piano.pdf
    • https://cdn.shopify.com/s/files/1/0440/0853/8262/files/diguzekapabozijuve.pdf
    • https://cdn.shopify.com/s/files/1/0440/7640/0792/files/gusisedawakaraje.pdf
    • https://cdn.shopify.com/s/files/1/0432/0142/9662/files/lowrance_hds9_gen2_touch.pdf
    • https://static.usrfiles.com/ugd/26938b_7172b4abb9274998aa0e62f03a3a585f.pdf
    • https://static.usrfiles.com/ugd/39cb9d_e0190b675023469386852568d22e042f.pdf
    • https://static.usrfiles.com/ugd/b8c837_57c7de3b0d364c1fbf8deb0b00ac6e9d.pdf
    • https://static.usrfiles.com/ugd/e3ed1f_49e247b457b9456c8357d4f8f440cbb0.pdf
    • https://static.usrfiles.com/ugd/e745be_f521475d9a3a4e548cd471716cfae471.pdf
    • https://static.usrfiles.com/ugd/0cd3a8_079184f3f6324fb5b0bb36ddbe5c0a11.pdf
    • https://cdn.shopify.com/s/files/1/0434/4505/9749/files/mawawuvisofobogim.pdf
    • https://cdn.shopify.com/s/files/1/0431/4329/9228/files/lovilagaranelexerugu.pdf
    • https://cdn.shopify.com/s/files/1/0432/6188/6627/files/47075689087.pdf
    • https://cdn.shopify.com/s/files/1/0431/8789/6480/files/93789893129.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_off0000609e.bin
dbce1a5ef0d93c0ba61197e100af4359c597ab4f68ab5238409f180c0d2fd502		 pdf-font-stream PDF embedded font (sfnt) at offset 0x609E 5724 bytes
font_01_sfnt_off000072ec.bin
f722f8477fe3cdd6021c40f4791e65131b58bfd2fac83a5536d09ddc9ac11eaf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x72EC 15432 bytes
font_02_sfnt_off0000a2b2.bin
e619a639363efb8a8c499d9b10964d1cd014b9e04bc729d500f2b798c8236684		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA2B2 16076 bytes
font_03_sfnt_off0000b761.bin
7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB761 4324 bytes

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