Malicious PDF — malware analysis report

Static analysis result for SHA-256 f4fd93c89f48879f…

MALICIOUS

PDF

52.8 KB Created: 2020-08-19 00:17:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 974cf860acaf8de60da037c695ceadee SHA-1: 4312cd22a89e5afbc7ba7c47f27977a0dca28f62 SHA-256: f4fd93c89f48879f86fb0add1815ae6ed84ef6c773b0a1bd99fb610251c19020
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file was flagged as malicious due to the presence of a link to a known malicious redirector. The document body contains obfuscated text and the URL itself, which points to a redirector service. This suggests the primary intent is to lure the user to a malicious destination, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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=bijli+ki+taar+hai+song++bestwap
    • http://files.bordencreeklabradors.com/uploads/1/3/1/3/131383541/jevulegujejin-ritumejo.pdf
    • http://files.northridgetennisacademy.org/uploads/1/3/1/3/131384401/e1093b644a1aba.pdf
    • https://cdn.shopify.com/s/files/1/0432/1627/3563/files/22488511407.pdf
    • https://cdn.shopify.com/s/files/1/0435/3520/4511/files/worx_14_inch_chainsaw_manual.pdf
    • https://cdn.shopify.com/s/files/1/0436/7453/4041/files/proyecto_de_investigacion_de_mercado_ejemplo.pdf
    • https://cdn.shopify.com/s/files/1/0435/4487/1063/files/carcel_de_amor_carol_marinelli.pdf
    • https://cdn.shopify.com/s/files/1/0429/3401/0015/files/tenis_beira_rio_preto_plataforma.pdf
    • https://cdn.shopify.com/s/files/1/0433/5127/7726/files/fepasuxepapolez.pdf
    • https://cdn.shopify.com/s/files/1/0433/2371/9845/files/78288006029.pdf
    • https://cdn.shopify.com/s/files/1/0433/6081/3208/files/jipijerudovewamekuwi.pdf
    • https://cdn.shopify.com/s/files/1/0429/9236/9823/files/a_prayer_for_owen_meany.pdf
    • https://cdn.shopify.com/s/files/1/0447/8484/4949/files/fire_meet_gasoline_lyrics.pdf
    • https://cdn.shopify.com/s/files/1/0431/7904/9121/files/wetekixoxeloroxenevaj.pdf
    • https://cdn.shopify.com/s/files/1/0431/4529/8077/files/perimeter_of_2d_shapes_worksheet_tes.pdf
    • https://cdn.shopify.com/s/files/1/0446/6917/3923/files/neurofibromatosis_type_1.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_off00006122.bin
527a1e8735a567bfaf64c0fe1e0544649a0a2656313bcb03dcbb1763ce386d98		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6122 5500 bytes
font_01_sfnt_off000073da.bin
6e04526df4af473519536a327edb43a08391c6c20aea0c5eadc4125f06572c87		 pdf-font-stream PDF embedded font (sfnt) at offset 0x73DA 15056 bytes
font_02_sfnt_off0000a311.bin
c988415812f594187b0a0ed75dc52802e798e1695b49bd300f8412a65040a449		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA311 16204 bytes
font_03_sfnt_off0000b87c.bin
f51e20e5af10a81ad61e59b12de09fdbadab061292b4969b69a17c45de2fe45e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB87C 3568 bytes

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