Malicious PDF — malware analysis report

Static analysis result for SHA-256 12620feb2b96801e…

MALICIOUS

PDF

41.3 KB Created: 2020-09-12 01:11:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ad593e5520275e7b9bd2e53e8c60880a SHA-1: bce7bd31659c4b48e2023f6e046c75b07284bf16 SHA-256: 12620feb2b96801ed14ab827eeae7147587b526cd595a5463431798585052533
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded links, with one specifically pointing to a known malicious redirector. The document body, though heavily obfuscated, contains a URL that matches the malicious redirector. This suggests an attempt to direct users to potentially harmful content, likely for phishing or malware distribution. No scripts were extracted, but the presence of malicious links is a strong indicator of malicious intent.

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.club/pify?keyword=acrylic+sheet+cutter
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/9309/8660/files/nedutoj.pdf
    • https://cdn.shopify.com/s/files/1/0429/6212/4959/files/17257657354.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/sovir.pdf
    • https://cdn.shopify.com/s/files/1/0433/1231/6584/files/antimicrobial_susceptibility_testing_protocols.pdf
    • https://cdn.shopify.com/s/files/1/0437/9151/5809/files/rofabatodenerajanolajubas.pdf
    • https://static.usrfiles.com/ugd/b80405_811409a779234e77918e80c8c5b31ff3.pdf
    • https://static.usrfiles.com/ugd/2813e2_9f4bf7f581664e1e9b14a47237572eeb.pdf
    • https://static.usrfiles.com/ugd/1decf9_875c01cce21a4cc19f944ff44aff0018.pdf
    • https://static.usrfiles.com/ugd/205ae4_9e1a6e0fd6c14fbb917d2d91b43afc9d.pdf
    • https://static.usrfiles.com/ugd/b8c837_b935ffb06d364bbbab26a4ffbc5f59e0.pdf
    • https://static.usrfiles.com/ugd/0010c8_9d0bdf7ffde74a348b7d3ed63991498e.pdf
    • https://static.usrfiles.com/ugd/bd5c68_764dbbeb762f41268dccc89cc1fc307d.pdf
    • https://cdn.shopify.com/s/files/1/0433/2391/6443/files/neurological_physiotherapy_a_problem_solving_approach.pdf
    • https://cdn.shopify.com/s/files/1/0430/8421/8532/files/62231161509.pdf
    • https://cdn.shopify.com/s/files/1/0431/3484/5079/files/wukimajip.pdf
    • https://cdn.shopify.com/s/files/1/0447/0249/8970/files/blanchard_macroeconomics_book.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006500.bin
a493da1dd5e8303d21e996c247b2b1f21adb8119f48a4a29e3da827ce07bb2de		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6500 4768 bytes
font_01_sfnt_off0000753c.bin
0c90232234e292ebdaabed48449dbbd4cc71c61de6c27ee59dbddc5b1d50cf5e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x753C 10228 bytes

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