Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae4d2d2a14faeba7…

MALICIOUS

PDF

43.0 KB Created: 2020-08-25 01:51:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 08cdb9bad120ab24bfd0248f153f6618 SHA-1: 7c7be7fe5ae4a0c9309ea9361896df54e355cef0 SHA-256: ae4d2d2a14faeba772cb8ba06d424b7d737c9e8026c13b5c970504337dca06ff
152 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing indicating it links to known malicious redirector infrastructure, specifically 'ttraff.cc'. The document body, though heavily obfuscated, contains the same URL. The PDF also exhibits characteristics of a link farm, with numerous embedded URLs pointing to external resources, many hosted on Shopify. The ML classifier strongly flagged this PDF as malicious, supporting the conclusion that it is designed to redirect users to 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.cc/pify?keyword=icarly+theme+song+flute+sheet+music
    • http://files.motivatedmovingsolutions.com/uploads/1/3/1/8/131871501/zuwavop-jagivosemejajov.pdf
    • http://files.nphsjrwolfpack.com/uploads/1/3/1/4/131408139/ninabopot.pdf
    • http://tulukenez.evanjosephsalon.com/uploads/1/3/0/7/130775403/8569341.pdf
    • https://cdn.shopify.com/s/files/1/0430/5630/0186/files/finudegalufajobupan.pdf
    • https://cdn.shopify.com/s/files/1/0437/6104/1569/files/fox_sports_world_cup_schedule.pdf
    • https://cdn.shopify.com/s/files/1/0435/0319/0180/files/physics_textbook_pearson.pdf
    • https://cdn.shopify.com/s/files/1/0431/9772/6880/files/apache_poi_excel_export.pdf
    • https://cdn.shopify.com/s/files/1/0429/7365/9290/files/telazum.pdf
    • https://cdn.shopify.com/s/files/1/0437/3502/3765/files/android_font_families.pdf
    • https://cdn.shopify.com/s/files/1/0435/9208/9763/files/58161908715.pdf
    • https://cdn.shopify.com/s/files/1/0435/1718/2104/files/bezegejapenomuv.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/20726054751.pdf
    • https://cdn.shopify.com/s/files/1/0433/0396/0731/files/pathfinder_roleplaying_game_advanced_race_guide.pdf
    • https://cdn.shopify.com/s/files/1/0434/1055/5041/files/27337046640.pdf
    • https://cdn.shopify.com/s/files/1/0433/7985/1414/files/44118272899.pdf
    • https://cdn.shopify.com/s/files/1/0437/8948/4189/files/11090755617.pdf
    • https://cdn.shopify.com/s/files/1/0429/2280/3366/files/kizuwemojebadunavasufezaf.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/
    • https://cdn.shopify.com/s/files/1/0435/1718/2104/files/bezeg

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006acf.bin
76c4968b73cb6e9e402f2b0ac31c765e2d41f4b379688879c30629c30664bde0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6ACF 5336 bytes
font_01_sfnt_off00007cd4.bin
9d563c4a95fa09e5220762420cdfed5d9f1b9a9bbac9ce00e9c0735bdd8c8f6e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7CD4 9984 bytes

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