Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0fb9e0f43af7d4b…

MALICIOUS

PDF

42.3 KB Created: 2020-08-14 11:26:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: de2711f3790bd8b75eefd33744982684 SHA-1: e83361c64b20c4fc00556f16bfa01dcb218a85e6 SHA-256: e0fb9e0f43af7d4b82fad9f2d536f10d0ceea087ab738a1d1a8b443a752a245d
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Phishing: Spearphishing Attachment T1059.001 Command and Scripting Interpreter: PowerShell

The PDF contains a large number of embedded links, many of which point to external resources, including a known malicious redirector. The ML classifier also strongly indicated maliciousness. The primary attack pattern involves luring users to potentially malicious sites via a link farm disguised as document content. No scripts were extracted, limiting the analysis of direct payload execution.

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=channels+and+media+of+communication+pdf
    • http://files.laperdriere.org/uploads/1/3/2/3/132302710/kogajode.pdf
    • http://kolidekoz.barryshlachter.net/uploads/1/3/1/4/131407227/2153812a589.pdf
    • http://files.urbanity.ca/uploads/1/3/1/3/131398129/tenutugagevipalu.pdf
    • http://files.our-redeemers.com/uploads/1/3/1/3/131383541/watifezobagiwided.pdf
    • http://files.poorhousecandles.com/uploads/1/3/1/4/131437532/zugudedarobupid-minewar-romegutogisikul-wexiz.pdf
    • https://cdn.shopify.com/s/files/1/0427/9028/9574/files/keroximuxukenik.pdf
    • https://cdn.shopify.com/s/files/1/0432/6732/6112/files/periodic_table_image.pdf
    • https://cdn.shopify.com/s/files/1/0431/1754/3588/files/muruvidafazi.pdf
    • https://cdn.shopify.com/s/files/1/0431/3228/9180/files/10803218300.pdf
    • https://cdn.shopify.com/s/files/1/0429/2693/2124/files/99218169858.pdf
    • https://cdn.shopify.com/s/files/1/0429/7680/5013/files/wewovalasitakegukakix.pdf
    • https://cdn.shopify.com/s/files/1/0439/0001/0664/files/spondylosis_adalah.pdf
    • https://cdn.shopify.com/s/files/1/0432/2636/6116/files/rupon.pdf
    • https://cdn.shopify.com/s/files/1/0429/1539/7788/files/wegemoxado.pdf
    • https://cdn.shopify.com/s/files/1/0428/9134/6079/files/chandrayaan_2_information_in_english.pdf
    • https://cdn.shopify.com/s/files/1/0434/3850/6146/files/scope_of_business_statistics.pdf
    • https://cdn.shopify.com/s/files/1/0439/1036/5339/files/topographic_map_lab.pdf
    • https://cdn.shopify.com/s/files/1/0438/4620/5602/files/basic_automobile_engineering_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0432/4065/2960/files/35525336470.pdf
    • https://cdn.shopify.com/s/files/1/0435/5486/5320/files/fimomesukudetasu.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_off000067bf.bin
7516f1a3608b17eb7f7ae1c3b36a0ade602e4168df3f02bf5c3b041c755e3088		 pdf-font-stream PDF embedded font (sfnt) at offset 0x67BF 5204 bytes
font_01_sfnt_off00007949.bin
060dace1accfd57ed467e8e56b4233cdb566b9a66379f5a7da7bb9ea6668f3c6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7949 10160 bytes

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