Malicious PDF — malware analysis report

Static analysis result for SHA-256 6edce46804249dd4…

MALICIOUS

PDF

43.7 KB Created: 2020-09-15 21:42:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3c3914200403913fc46cb7427b92b190 SHA-1: f48d168a92ab14f8ec6dde4cbab57e72dc1238b3 SHA-256: 6edce46804249dd4858a2b9658858d3b8bbc80d88d39b8a7cec8a6e2a53a29a1
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded links, with one identified as a known malicious redirector. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external PDF links, suggesting an attempt to manipulate search engine results or distribute further malicious content. The ML classifier also strongly flagged this PDF as malicious.

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=the+visible+hand+study
    • http://files.ledgewoodhills.net/uploads/1/3/1/3/131379554/936086.pdf
    • http://gurale.knarlyknot.com/uploads/1/3/0/7/130740522/zijuxebowuxepij_godeb.pdf
    • http://kukamunil.manzanitasplayschool.org/uploads/1/3/1/6/131636601/8589339.pdf
    • http://files.kelsey-harrison.com/uploads/1/3/1/3/131383698/f28d524439f07e.pdf
    • http://pawuvas.celestialstarsdance.com/uploads/1/3/0/7/130775940/lijolufevavi-rimiziluxe-vumoxipe.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/de9003_19543bca9efe488489a0f1d561d2bfaf.pdf
    • https://static.usrfiles.com/ugd/12daa7_7ad927c1ec4547f9915138513a9b2ba6.pdf
    • https://static.usrfiles.com/ugd/565485_4127021bbaa54b12a1b88f748ef07800.pdf
    • https://static.usrfiles.com/ugd/704988_a5201cc8c99f461c8d1901897cdc7682.pdf
    • https://static.usrfiles.com/ugd/dc8a8e_60c7fed7230e49b988370b595fedb7c4.pdf
    • https://static.usrfiles.com/ugd/25c42e_8cd427a06ec348e1ba835750822d1115.pdf
    • https://static.usrfiles.com/ugd/b914b5_950b32a9a54a47bbb21782ed9f6f42d1.pdf
    • https://static.usrfiles.com/ugd/0cd019_3b1ab69a90044aa68361540e815463b4.pdf
    • https://static.usrfiles.com/ugd/6c313a_c08fe21a31324ab683b357fc8e1397a0.pdf
    • https://static.usrfiles.com/ugd/81b904_47b9b7e6599145aab105ad6718383ec1.pdf
    • https://cdn.shopify.com/s/files/1/0433/6209/1167/files/pdf_attention_deficit_hyperactivity_disorder_a_handbook_for_diagnosis_and_treatment.pdf
    • https://cdn.shopify.com/s/files/1/0440/7764/5974/files/98604487215.pdf
    • https://cdn.shopify.com/s/files/1/0433/6861/1998/files/aaron_burr_sir_sheet_music.pdf
    • https://cdn.shopify.com/s/files/1/0429/1844/5223/files/gikerijutugawasovuro.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_off00006df2.bin
17293a8a749fdfcb0d868d4dcac1b0d52ff948b2713a0e14b8c9e3549be399c2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6DF2 5068 bytes
font_01_sfnt_off00007f34.bin
02d6dd58c26ad1a3026b3f50d03227655d608c51f9c2abbec9c1538faa1c34fb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7F34 10208 bytes

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