Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2b265be731408f3…

MALICIOUS

PDF

44.7 KB Created: 2020-08-05 14:39:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e491ca88c722804369876ac5483d4f04 SHA-1: 2fed867683c5a1a66e071239a377ae76a40b439e SHA-256: e2b265be731408f377e9f73ad832831d0b9e4fc79ef9508406a064e6b62139c6
154 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to a link farm hosted on Shopify. One of the primary links, https://ttraff.com/pify?keyword=catia+assembly+design+pdf, is identified as a malicious redirector. This suggests the document is designed to redirect users to malicious sites under the guise of providing search results for technical documents.

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/pify?keyword=catia+assembly+design+pdf
    • http://files.mrmasigan.com/uploads/1/3/2/6/132681164/tigasezoli_junidiwogina_pafelekof_didisitulef.pdf
    • http://files.nalcbranch32.com/uploads/1/3/0/8/130874110/e56727ee3c.pdf
    • http://files.pensvault.com/uploads/1/3/1/1/131164520/laximazuzesa-sadelumujumozo.pdf
    • https://cdn.shopify.com/s/files/1/0438/8965/5960/files/pazalunuvugozuxuroma.pdf
    • https://cdn.shopify.com/s/files/1/0427/7082/5382/files/online_bus_ticket_booking_system_project.pdf
    • https://cdn.shopify.com/s/files/1/0434/4102/9276/files/59828361140.pdf
    • https://cdn.shopify.com/s/files/1/0436/0473/8206/files/gagorapoleb.pdf
    • https://cdn.shopify.com/s/files/1/0435/1030/0831/files/the_hobbit_an_unexpected_journey_misty_mountains.pdf
    • https://cdn.shopify.com/s/files/1/0428/0877/0726/files/mesoful.pdf
    • https://cdn.shopify.com/s/files/1/0430/5630/0186/files/wajepexutadesikakesuwex.pdf
    • https://cdn.shopify.com/s/files/1/0435/3599/0936/files/gozanixarujop.pdf
    • https://cdn.shopify.com/s/files/1/0432/2590/7368/files/bizusajixosidamalapu.pdf
    • https://cdn.shopify.com/s/files/1/0433/2647/2345/files/definicion_de_biotecnologia_ambiental.pdf
    • https://cdn.shopify.com/s/files/1/0433/3328/8088/files/makebajubajamakifof.pdf
    • https://cdn.shopify.com/s/files/1/0432/6863/6834/files/993087850.pdf
    • https://cdn.shopify.com/s/files/1/0430/4296/3613/files/shaft_boring_machine.pdf
    • https://cdn.shopify.com/s/files/1/0433/8404/5719/files/patamuzenubenofuxu.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_off00006fdc.bin
a1124ef2a17a3b970779ffa20a1c29f6d6de678912bbf97e7a151791c8fff17d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6FDC 5412 bytes
font_01_sfnt_off00008237.bin
a957cd72123da7285f23950203656a46fc1bd5abe8bacf284008a77b2eb2c73c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8237 10644 bytes

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