Malicious PDF — malware analysis report

Static analysis result for SHA-256 29d315c37650792e…

MALICIOUS

PDF

42.8 KB Created: 2020-08-30 13:48:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4f49fb841d0d6355050911eac00dbbd2 SHA-1: 42dafbeb622ac7bcd9934d5c678c6f5a1d38dc6e SHA-256: 29d315c37650792e0f37461eecc41e9e8f68457fbd98b93c2b5517cdaf719bf9
120 Risk Score

Malware Insights

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

The PDF file exhibits characteristics of a link farm, embedding numerous external links. One prominent URL, 'https://ttraff.cc/wix?keyword=tabla+de+adverbios+de+frecuencia', is flagged as a malicious redirector. The document body, though heavily obfuscated, also contains this URL and other PDF links, suggesting an attempt to lure users to malicious sites. The presence of a link farm and a malicious redirector points towards a phishing or malware distribution attack pattern.

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.cc/wix?keyword=tabla+de+adverbios+de+frecuencia
    • https://cdn.shopify.com/s/files/1/0437/6759/5165/files/chunkzz_malayalam_full_movie_720p.pdf
    • https://cdn.shopify.com/s/files/1/0440/1784/4382/files/metro_dc_rail_map.pdf
    • https://cdn.shopify.com/s/files/1/0438/8726/3899/files/74454228463.pdf
    • https://cdn.shopify.com/s/files/1/0437/3938/1912/files/99534797939.pdf
    • https://cdn.shopify.com/s/files/1/0438/6160/6550/files/glencoe_physical_science_textbook_teacher_edition.pdf
    • https://cdn.shopify.com/s/files/1/0430/9165/6864/files/98630749207.pdf
    • https://cdn.shopify.com/s/files/1/0430/4211/1650/files/56740965301.pdf
    • https://cdn.shopify.com/s/files/1/0435/9729/9869/files/alternating_current_machines_by_puch.pdf
    • https://static.usrfiles.com/ugd/0adedf_4bf79b90fd0e4a67900014780cabf68d.pdf
    • https://static.usrfiles.com/ugd/b8c837_9468c68c203d421d9b0aad9a643e84c8.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_off00005f87.bin
c5218be4ca209167c91fbba5c774abc06913967a5008fbf63cb15acc8468de03		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F87 5164 bytes
font_01_sfnt_off0000711e.bin
a36eee06fef6ce219692c4ec918276ac99413e4fd1e3666e4031624f9289d620		 pdf-font-stream PDF embedded font (sfnt) at offset 0x711E 1800 bytes
font_02_sfnt_off000079ab.bin
08e7222812879c2cdcef0a04be236579da6d652497e218674acc93190aa61cd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x79AB 11276 bytes

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