Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d24f9f46aa66c19…

MALICIOUS

PDF

50.2 KB Created: 2020-08-31 03:06:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2893093573d23687e8a0c937264b9a15 SHA-1: 5278a66fef58441268ae1affce968848dafad694 SHA-256: 9d24f9f46aa66c1952644bfd1c482fb982a712d31b8e985843e08fb2aa861ecc
154 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link pointing to 'ttraff.cc', which is flagged as malicious. It also exhibits characteristics of a PDF link farm, with numerous embedded links, many hosted on Shopify. The ML classifier strongly indicates maliciousness. The primary attack vector appears to be social engineering through a deceptive link within the document body, aiming to redirect the user to a harmful site or initiate a download.

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/wix?keyword=ap+computer+science+principles+pract
    • https://cdn.shopify.com/s/files/1/0459/5800/4895/files/nomeniga.pdf
    • https://cdn.shopify.com/s/files/1/0454/4040/1566/files/cannondale_lefty_service.pdf
    • https://cdn.shopify.com/s/files/1/0434/7622/2114/files/johnson_outboards_manual.pdf
    • https://cdn.shopify.com/s/files/1/0434/2058/2050/files/nuparutijijiseb.pdf
    • https://cdn.shopify.com/s/files/1/0438/7130/5896/files/gufatodoxuzudifoxibo.pdf
    • https://cdn.shopify.com/s/files/1/0428/7247/1718/files/ready_or_not_after_7.pdf
    • https://cdn.shopify.com/s/files/1/0428/0070/9791/files/new_american_bible_catholic.pdf
    • https://cdn.shopify.com/s/files/1/0437/9194/1781/files/xufovavemamafedeta.pdf
    • https://cdn.shopify.com/s/files/1/0429/8535/7463/files/5394234572.pdf
    • https://cdn.shopify.com/s/files/1/0429/9712/1178/files/talavegobejekosabopitu.pdf
    • https://cdn.shopify.com/s/files/1/0432/6352/5026/files/cambridge_igcse_business_studies_coursebook_answers.pdf
    • https://cdn.shopify.com/s/files/1/0432/8049/8852/files/17744679076.pdf
    • https://cdn.shopify.com/s/files/1/0440/6679/9766/files/dirty_grandpa_parents_guide.pdf
    • https://cdn.shopify.com/s/files/1/0458/5973/3657/files/75848446370.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_off00005bea.bin
18051e4a50e13d37cfcc64ba52949b72184cc826161817450a3bdf250c45a94f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5BEA 5068 bytes
font_01_sfnt_off00006cfa.bin
80132f6efea4d476e01ea80a4fbd3e7268edd4aae6f387ebe7937c61e5c90088		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6CFA 6304 bytes
font_02_sfnt_off00008155.bin
9d85da6b32f463f0744fba7effd6b90f51932d619c8ef70c5666ccb20db61086		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8155 10932 bytes
font_03_sfnt_off0000a6ad.bin
52db30b66cfb76898988bc7c6ed152514c301740808ab95bec9c68e49df23550		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA6AD 16036 bytes

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