Malicious PDF — malware analysis report

Static analysis result for SHA-256 9df75312c73c75cc…

MALICIOUS

PDF

60.0 KB Created: 2020-08-15 05:43:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9c6654a2b1b58464301cba1eb28b0226 SHA-1: 3b33d5cd8f23b12d5f26f9cc33a30db2963d61bf SHA-256: 9df75312c73c75cc84f19beb57266931de4c2ce98b70463ee82939488713ffd2
150 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.com, disguised with a keyword relevant to the document's apparent content. The PDF also features a large number of embedded links, many pointing to Shopify domains, suggesting a link farm or SEO manipulation tactic to obscure the malicious destination. The ML classifier strongly indicates maliciousness, and the overall structure points to a phishing or redirection attempt.

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.com/wb?keyword=narasimha%20mantra%20in%20kannada%20pdf
    • http://xezapov.jwshope.com/uploads/1/3/0/9/130969149/4472817.pdf
    • http://files.wimberlysbeautybar.com/uploads/1/3/2/7/132740414/6033973ab.pdf
    • https://cdn.shopify.com/s/files/1/0429/6556/5589/files/gexodosogebuzisinumisot.pdf
    • https://cdn.shopify.com/s/files/1/0431/6200/9755/files/saddleback_basic_english_grammar_book_1_answers.pdf
    • https://cdn.shopify.com/s/files/1/0429/1434/9219/files/10205681562.pdf
    • https://cdn.shopify.com/s/files/1/0429/4141/5587/files/76010080475.pdf
    • https://cdn.shopify.com/s/files/1/0430/8303/8881/files/83675292379.pdf
    • https://cdn.shopify.com/s/files/1/0429/8535/7463/files/zanajitavesibuvi.pdf
    • https://cdn.shopify.com/s/files/1/0434/2077/8653/files/45055636417.pdf
    • https://cdn.shopify.com/s/files/1/0434/2710/2876/files/al_seyassah_newspaper.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/85755015361.pdf
    • https://cdn.shopify.com/s/files/1/0431/7573/9553/files/sword_art_online_15_alicization_invading.pdf
    • https://cdn.shopify.com/s/files/1/0435/9431/7981/files/car_lighting_system_circuit.pdf
    • https://cdn.shopify.com/s/files/1/0437/9577/5650/files/peter_kreeft_handbook_of_christian_apologetics.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off000089f1.bin
876e42b4c52c68aca133b65e15022d63f217cb9e243dd5d71ca84c560e00622d		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x89F1 8924 bytes
font_00_sfnt_off00006c83.bin
de56850c4e859b5444269f282e890d4a75d787a22f63f4a8e51d7fe2c7f73abc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C83 5280 bytes
font_01_sfnt_off00007e4f.bin
aa171a0b423f922b924df6a8e360969f3078cf7620dd78282892c56c0e421d98		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7E4F 3772 bytes
font_03_sfnt_off0000a1a4.bin
817fc9fed2bb51a488ddc351814aab49c45546c301a2d7e65427c6214330d0a2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA1A4 10868 bytes
font_04_sfnt_off0000c50a.bin
42a137ee81f263b7db89eeca5f386d896704594036a4c0c4b9c843fd8877cc63		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC50A 8792 bytes

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