Malicious PDF — malware analysis report

Static analysis result for SHA-256 97535955df0689b4…

MALICIOUS

PDF

53.2 KB Created: 2020-08-04 19:07:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 73de81a852050770fe738e09573dbda0 SHA-1: 8dd9218ff4465daccadba11545fb07e8c9e55ae8 SHA-256: 97535955df0689b4b2ff693b2e0a576c9520d0a4614e8a04b4ca13e4efc78fda
120 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with a critical heuristic firing for PDF_SEO_LINK_FARM indicating a link farm. One of these links, 'https://ttraff.com/pify?keyword=ave+maria+gounod+violino+pdf', is flagged as a malicious redirector. The document body, though heavily obfuscated, contains references to these URLs, suggesting the primary purpose is to lure users to malicious sites.

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/pify?keyword=ave+maria+gounod+violino+pdf
    • http://files.cerealalchemist.com/uploads/1/3/1/3/131397946/basexaguvefufu.pdf
    • http://files.youtrition.co.uk/uploads/1/3/0/9/130969426/7205707.pdf
    • http://files.siamdayspa.com/uploads/1/3/0/7/130775046/kozajibori.pdf
    • http://files.distrixgames.com/uploads/1/3/1/3/131384429/balav.pdf
    • https://cdn.shopify.com/s/files/1/0432/4252/0739/files/woximifadojelozidefewanaf.pdf
    • https://cdn.shopify.com/s/files/1/0438/9843/7787/files/molana_masood_azhar_bayan_mp3.pdf
    • https://cdn.shopify.com/s/files/1/0428/8725/0087/files/44976389112.pdf
    • https://cdn.shopify.com/s/files/1/0429/7300/3939/files/56909751044.pdf
    • https://cdn.shopify.com/s/files/1/0430/7045/5965/files/english_grammar_auxiliary_verbs.pdf
    • https://cdn.shopify.com/s/files/1/0431/7852/4831/files/69369791131.pdf
    • https://cdn.shopify.com/s/files/1/0433/2588/2518/files/puvotore.pdf
    • https://cdn.shopify.com/s/files/1/0434/5892/0605/files/veneridened.pdf
    • https://cdn.shopify.com/s/files/1/0432/9334/3912/files/master_of_disguise_sse.pdf
    • https://cdn.shopify.com/s/files/1/0433/5897/8207/files/xewodugoruwizoniwarosa.pdf
    • https://cdn.shopify.com/s/files/1/0432/5743/0176/files/kirotasuruvizolofabin.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/27392185694.pdf
    • https://cdn.shopify.com/s/files/1/0430/5892/1621/files/73073287075.pdf
    • https://cdn.shopify.com/s/files/1/0430/2392/5402/files/mawebunevupazofavaxoxoga.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_off00006786.bin
3b8b67e1c17f10cf092ddda2f70f2ffcc5f4c6c35a982a5967b4f698f9a5e1d4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6786 5232 bytes
font_01_sfnt_off0000793e.bin
e745cce7314f750046998af004fecd6a123a5fbbaded7f985ee1a2ff572d7d46		 pdf-font-stream PDF embedded font (sfnt) at offset 0x793E 2060 bytes
font_02_sfnt_off000082e6.bin
b81ba780d8b21741b9335dcc6e74bc7e8e44f4d493d6517a3cdf15ecd3184996		 pdf-font-stream PDF embedded font (sfnt) at offset 0x82E6 15460 bytes
font_03_sfnt_off0000b265.bin
292b67320f20e7e38814323bff47001ccb55b5eebb397aea8a254f3e91f57b87		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB265 16096 bytes

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