Malicious PDF — malware analysis report

Static analysis result for SHA-256 4c2faa3b8152e39d…

MALICIOUS

PDF

53.9 KB Created: 2020-08-30 14:52:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 32377ab1bfe84dcbf2240694e59cb7d3 SHA-1: 9ba63327429bb37c1750f2b74ccc6e20b074281d SHA-256: 4c2faa3b8152e39da249bc788c3cc7093bd428f0cec6b0824f8468027d3fb33e
152 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. Additionally, it exhibits characteristics of a PDF SEO link farm, with numerous external links, many hosted on cdn.shopify.com. The ML classifier strongly flagged this PDF as malicious. The embedded URL 'https://ttraff.com/wix?keyword=skyrim+restart+quest' is the primary indicator of malicious intent, likely serving as a lure to a phishing or malware distribution site.

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=skyrim+restart+quest
    • https://static.usrfiles.com/ugd/b8c837_4888ca9a04c847228ff20eebe8ea2965.pdf
    • https://static.usrfiles.com/ugd/0fdb6d_2f86183fa0b2481a8be9d10f2ac512ee.pdf
    • https://static.usrfiles.com/ugd/9c43ec_cacc96b06795478da59367706113404c.pdf
    • https://static.usrfiles.com/ugd/12f4eb_ed04733b9d8040148222058d4b8ef98c.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/lalosukiwafigoledexefes.pdf
    • https://cdn.shopify.com/s/files/1/0435/5322/6913/files/africa_sheet_music.pdf
    • https://cdn.shopify.com/s/files/1/0435/1882/0511/files/como_usar_la_armadura_de_dios.pdf
    • https://cdn.shopify.com/s/files/1/0430/6799/8362/files/penopapanovibasavuzira.pdf
    • https://cdn.shopify.com/s/files/1/0432/8318/5832/files/59445235894.pdf
    • https://cdn.shopify.com/s/files/1/0428/0002/1667/files/fisisu.pdf
    • https://cdn.shopify.com/s/files/1/0433/5904/3749/files/32629395099.pdf
    • https://cdn.shopify.com/s/files/1/0427/4506/9724/files/fizogebuveza.pdf
    • https://cdn.shopify.com/s/files/1/0434/0468/9558/files/zufenimulituwiluba.pdf
    • https://cdn.shopify.com/s/files/1/0431/1403/7397/files/guessing_game_java.pdf
    • https://cdn.shopify.com/s/files/1/0432/9252/4702/files/58339119130.pdf
    • https://cdn.shopify.com/s/files/1/0431/1403/7409/files/bodybuilding_food_recipes.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_off00007bb7.bin
9dcb1c3c5167d55e22b4c4c3b7a8a8f812affe8e7abcaebf768cae936ea4344a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7BB7 4860 bytes
font_01_sfnt_off00008c41.bin
23e2e74dcdb208f3f4834af55f8f1cb1fa768ee03bbc4ddbbd219a17240b67b0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8C41 15516 bytes
font_02_sfnt_off0000bc67.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBC67 4324 bytes

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