Malicious PDF — malware analysis report

Static analysis result for SHA-256 377ce4817b4a96e6…

MALICIOUS

PDF

63.8 KB Created: 2020-08-31 00:42:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: edc4336a58c31323914c9fe4ac9eba4c SHA-1: 8a9c252d73fd72178dd4cb435cc637ab43f47b12 SHA-256: 377ce4817b4a96e6aabfdecfb2d38f1eae155e7cb88de1f56a36b32bf1be223a
152 Risk Score

Malware Insights

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

The PDF document's metadata and body text suggest a lure related to a 'Suzuki swift workshop manual'. Heuristic analysis indicates the presence of a malicious redirector link pointing to 'ttraff.com' and a large number of external PDF links, characteristic of a link farm. The ML classifier strongly flagged this PDF as malicious. The primary attack vector appears to be directing users to malicious infrastructure via embedded links.

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=suzuki+swift+workshop+manual+free+do
    • https://cdn.shopify.com/s/files/1/0431/2865/1938/files/zelobovejez.pdf
    • https://cdn.shopify.com/s/files/1/0434/0659/0106/files/achilles_tendinopathy_exercises.pdf
    • https://cdn.shopify.com/s/files/1/0430/7812/3669/files/77453514274.pdf
    • https://cdn.shopify.com/s/files/1/0433/5537/3720/files/the_martian_andy_weir.pdf
    • https://cdn.shopify.com/s/files/1/0434/4895/9141/files/nanaloxid.pdf
    • https://cdn.shopify.com/s/files/1/0431/5326/0706/files/83663554400.pdf
    • https://static.usrfiles.com/ugd/7d1dc9_f3456abcfadc437da2a4881697fdb5c4.pdf
    • https://static.usrfiles.com/ugd/b8c837_b9a42f47445e48849989b37a702e4ada.pdf
    • https://static.usrfiles.com/ugd/d5415a_bfd68b78ea144a2f960e7f6d5db4102b.pdf
    • https://cdn.shopify.com/s/files/1/0430/1045/7753/files/spider_man_2002_pc_game_free.pdf
    • https://cdn.shopify.com/s/files/1/0437/5206/3125/files/42205534662.pdf
    • https://cdn.shopify.com/s/files/1/0431/8697/8984/files/89913420952.pdf
    • https://cdn.shopify.com/s/files/1/0440/9714/2936/files/control_panel_worksheet_2008t_machine.pdf
    • https://cdn.shopify.com/s/files/1/0435/9097/5647/files/cachaza_de_caa_de_azucar.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/1/0430/1045/7753/files/spider_ma

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000a6a0.bin
d3bbb72f4622b8868a60b20435c4a479ead2d53a3b7336f4da3773b2d9bd2b6f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA6A0 5472 bytes
font_01_sfnt_off0000b920.bin
921861ad9fe7cc474a8c4ed7a72963aafd734808ef4716761c075e87616d925c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB920 13824 bytes
font_02_sfnt_off0000e47a.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE47A 4324 bytes

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