Malicious PDF — malware analysis report

Static analysis result for SHA-256 48d1a17eed124671…

MALICIOUS

PDF

50.9 KB Created: 2020-08-04 23:24:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 12936179ec2a9e4cfa922a3d7f3f0361 SHA-1: 588e49e5dfd62d871e13ffcb31f833b496393843 SHA-256: 48d1a17eed124671000e6c5282c76d46dcad6c14904cd67a9158dae0fab14a0e
152 Risk Score

Malware Insights

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

The PDF was flagged by multiple critical heuristics for containing malicious redirector links and a link farm. The ML classifier also strongly indicated maliciousness. The document body contains numerous URLs, including a primary link to 'ttraff.ru', which is identified as a malicious redirector. This suggests the PDF is designed to lure users to malicious websites through a chain of redirects.

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.ru/pify?keyword=schema+complementi+analisi+logica+pdf
    • http://files.shine-bu.com/uploads/1/3/1/4/131437655/poresujolir.pdf
    • http://files.chloecustomcollections.com/uploads/1/3/1/4/131438175/ripimi.pdf
    • http://files.cantstopforeveryimpala.com/uploads/1/3/0/9/130969054/9040689.pdf
    • https://cdn.shopify.com/s/files/1/0431/0505/8976/files/18400959845.pdf
    • https://cdn.shopify.com/s/files/1/0437/0956/3035/files/97097915186.pdf
    • https://cdn.shopify.com/s/files/1/0434/4155/3575/files/baperekujizireduxiwolawed.pdf
    • https://cdn.shopify.com/s/files/1/0434/4378/1792/files/83592301680.pdf
    • https://cdn.shopify.com/s/files/1/0432/7034/0772/files/85379794786.pdf
    • https://cdn.shopify.com/s/files/1/0428/5690/6918/files/auto_injectuwad_injector.pdf
    • https://cdn.shopify.com/s/files/1/0429/2860/3295/files/xibumalegiwulojes.pdf
    • https://cdn.shopify.com/s/files/1/0432/0857/3085/files/nepon.pdf
    • https://cdn.shopify.com/s/files/1/0436/1725/5581/files/industrial_maintenance_test.pdf
    • https://cdn.shopify.com/s/files/1/0438/4797/5062/files/ayatul_kursi_dawoodi_bohra.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_off000061b3.bin
873eb24a85c7e7a53163faaa8720c103e42ec96032b08fe3eca1ca8bb12ad505		 pdf-font-stream PDF embedded font (sfnt) at offset 0x61B3 5364 bytes
font_01_sfnt_off000073c0.bin
6a5306b237caad86da8f633319ed9cd49ded12a0e85406b2de245843f277ef93		 pdf-font-stream PDF embedded font (sfnt) at offset 0x73C0 11472 bytes
font_02_sfnt_off00009980.bin
83b0f3ed90e545d6d36d14a1982d3fe7024877db6cf476e622725167f7eecf28		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9980 16204 bytes
font_03_sfnt_off0000aed0.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAED0 4324 bytes

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