Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d1ff4e5ade3ab2d…

MALICIOUS

PDF

39.3 KB Created: 2020-08-23 22:18:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9ac605855b194b339deee04dff61820d SHA-1: 52ff9f2035da289fe4216cb9fccb2fbb98cb1552 SHA-256: 3d1ff4e5ade3ab2da395bd92e1e60f9f05e99b7277290daa9f2885885d48efab
150 Risk Score

Malware Insights

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

The PDF was flagged as malicious due to a critical heuristic identifying it as a redirector link to known malicious infrastructure. It also contains a large number of external PDF links, characteristic of a link farm. The primary malicious URL identified is https://ttraff.com/pify?keyword=carrinho+de+bebe+cosco+nexus+manual, which is likely used to lure victims into clicking through to a malicious site. No scripts were extracted, limiting the analysis of direct payload execution.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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=carrinho+de+bebe+cosco+nexus+manual
    • http://files.davidmossac.com/uploads/1/3/1/4/131410818/jamazof.pdf
    • http://files.treeoflifementoring.com/uploads/1/3/2/7/132740362/tujoxanera-faxemetubunu-difanovisaxe.pdf
    • https://cdn.shopify.com/s/files/1/0429/4233/3087/files/34877206881.pdf
    • https://cdn.shopify.com/s/files/1/0429/9161/6153/files/11057980353.pdf
    • https://cdn.shopify.com/s/files/1/0436/0306/7038/files/dometic_rv_refrigerator_manual.pdf
    • https://cdn.shopify.com/s/files/1/0437/5419/3047/files/13140824375.pdf
    • https://cdn.shopify.com/s/files/1/0427/6623/7852/files/pdf_split_merge_rotate_software.pdf
    • https://cdn.shopify.com/s/files/1/0428/8158/1209/files/xuzimepuwejasutup.pdf
    • https://cdn.shopify.com/s/files/1/0429/2762/0249/files/83128880229.pdf
    • https://cdn.shopify.com/s/files/1/0430/4509/3530/files/jujewaxenupo.pdf
    • https://cdn.shopify.com/s/files/1/0437/4790/1592/files/mugozodedazuwanuza.pdf
    • https://cdn.shopify.com/s/files/1/0435/5325/9679/files/xoleduvizutaxoru.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005b21.bin
923742103788c91171dd05c36a23646c6b7c4e88cf05aafc6398217dfe2a2325		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5B21 5292 bytes
font_01_sfnt_off00006cec.bin
af73a67b34429c36703ff6e02bb7ee2373dacccf31c3b2fa87aa5e31898a2f40		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6CEC 10448 bytes

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