Malicious PDF — malware analysis report

Static analysis result for SHA-256 014217114902b479…

MALICIOUS

PDF

40.1 KB Created: 2020-08-06 12:29:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a37f70cb5f7d266a352d6922bac48f12 SHA-1: 47f7d306b6095a627be3ed2c6c4c706823880aec SHA-256: 014217114902b4796d6bcfcb0af529819e282e641af72b6f5a3f20769c355c21
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains numerous embedded links, with a critical heuristic firing indicating a redirect to known malicious infrastructure at 'ttraff.com'. The document body, though heavily obfuscated, contains this same URL, suggesting a lure to trick users into clicking. The ML classifier also strongly flagged this PDF as malicious. The primary attack pattern involves redirecting users to potentially harmful sites.

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/pify?keyword=bruckner+stenter+machine+pdf
    • http://files.rltfarms.com/uploads/1/3/1/3/131383826/wakozi.pdf
    • http://baxiluw.engagementlearningpress.com/uploads/1/3/1/3/131383297/28fb051.pdf
    • http://files.orangehistory.org/uploads/1/3/1/3/131380998/6a7d3c8e67aa6.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/9432/6939/files/vikudisowefegikotobobifo.pdf
    • https://cdn.shopify.com/s/files/1/0430/4224/2709/files/zasivofimafa.pdf
    • https://cdn.shopify.com/s/files/1/0430/0413/3525/files/kilukugusuwafewolodupepab.pdf
    • https://cdn.shopify.com/s/files/1/0433/9708/7390/files/chemistry_test_book.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/pexigubozorabavajodumixi.pdf
    • https://cdn.shopify.com/s/files/1/0430/8906/8185/files/36570306012.pdf
    • https://cdn.shopify.com/s/files/1/0438/1189/7504/files/78706418134.pdf
    • https://cdn.shopify.com/s/files/1/0429/7208/6423/files/24565406954.pdf
    • https://cdn.shopify.com/s/files/1/0430/7245/4810/files/witapuzefufuzuwumuj.pdf
    • https://cdn.shopify.com/s/files/1/0429/8443/9971/files/78453828246.pdf
    • https://cdn.shopify.com/s/files/1/0437/8384/8097/files/62858036030.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/70354855800.pdf
    • https://cdn.shopify.com/s/files/1/0429/1752/7715/files/66114735987.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/24501063531.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005e48.bin
713d5dccbbbbcfdcda36a9b08582861cc63b959323eeb06bf90d369ecbd7237f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5E48 5476 bytes
font_01_sfnt_off000070c3.bin
8d72f1abbad24530b6299079a62c4ef7b76f9b6e4cfbd49580ca51280f4a578f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x70C3 10228 bytes

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