Malicious PDF — malware analysis report

Static analysis result for SHA-256 c14c4ddd3a3099ca…

MALICIOUS

PDF

34.1 KB Created: 2020-08-20 23:07:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: da4e2fcaba11230537d430b09e6ce0c9 SHA-1: 39f5f72b73d56713ab992938d0522647e8848afb SHA-256: c14c4ddd3a3099cae5ee20eab9e426508044d7e5466a2629f43485efd9c353b8
152 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links, with one specifically pointing to a known malicious redirector. The ML classifier also strongly indicated maliciousness. The document body text is largely garbled, but the presence of the URL 'https://ttraff.cc/pify?keyword=animal+information+cards' suggests a lure related to 'animal information cards' which is then redirected. The large number of Shopify links, while many are benign, likely serves to obscure the malicious redirector or as part of a link farm.

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/pify?keyword=animal+information+cards
    • http://files.mountainvalleygscamp.com/uploads/1/3/1/4/131437680/tazivedi_fumaninixu_fepagikira_faxid.pdf
    • http://files.keepintouchjournals.com/uploads/1/3/1/3/131379830/zexajemat_wasofeje_nazefixogelan.pdf
    • http://files.kanbeautytherapyandcosmetology.com/uploads/1/3/1/4/131452836/5824278.pdf
    • https://cdn.shopify.com/s/files/1/0434/5672/5153/files/71070220799.pdf
    • https://cdn.shopify.com/s/files/1/0439/2806/0059/files/gaxebi.pdf
    • https://cdn.shopify.com/s/files/1/0439/8101/3150/files/15478273993.pdf
    • https://cdn.shopify.com/s/files/1/0438/3929/1554/files/cancer_cachexia_understanding_the_molecular_basis.pdf
    • https://cdn.shopify.com/s/files/1/0435/1868/9434/files/28134197946.pdf
    • https://cdn.shopify.com/s/files/1/0428/5428/5479/files/49899042821.pdf
    • https://cdn.shopify.com/s/files/1/0440/3150/8645/files/84625294205.pdf
    • https://cdn.shopify.com/s/files/1/0432/6309/9040/files/sevimaxakurorifutun.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_off00004856.bin
e6a071441133be0508615a5d7764d44dd4d247ae1a39be79e9e7175a8f58ae2c
pdf-font-stream PDF embedded font (sfnt) at offset 0x4856 5156 bytes
font_01_sfnt_off000059b6.bin
6d951d7a48ca2cb3eb0a7189b313eb65b98e11c87b47db9c59a7caf06a9396e9
pdf-font-stream PDF embedded font (sfnt) at offset 0x59B6 10076 bytes