Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e12be799cce992c…

MALICIOUS

PDF

46.8 KB Created: 2020-08-10 22:10:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 30b3756c81cf51ebe8d1ac3b023f7064 SHA-1: 762359fb54b5d675b0f25ccc2085e83687bbcf81 SHA-256: 9e12be799cce992c9e5fa12d0d9eafc318bc8af20f81df334068d595a25ee38c
152 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/pify?keyword=sociological+literary+criticism+pdf'. This indicates the document's primary purpose is to redirect the user to a potentially harmful site. The presence of a large number of external PDF links, many hosted on Shopify, suggests a link farm or SEO manipulation tactic to increase visibility or distribute 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.cc/pify?keyword=sociological+literary+criticism+pdf
    • http://jufokekov.gracievjewelrydesign.com/uploads/1/3/2/7/132740353/koraloxoruni-tixosisutuxizim-kafopux.pdf
    • http://bizamizu.herbierguinee.org/uploads/1/3/1/4/131408899/8997cf4582e.pdf
    • http://files.plumb-bing.co.nz/uploads/1/3/1/3/131380591/saxunif-dapasusajoj.pdf
    • https://cdn.shopify.com/s/files/1/0434/0069/1868/files/23095766856.pdf
    • https://cdn.shopify.com/s/files/1/0432/5851/1522/files/movibizogerapafaj.pdf
    • https://cdn.shopify.com/s/files/1/0430/5453/0714/files/biwezovudubi.pdf
    • https://cdn.shopify.com/s/files/1/0432/2449/8343/files/pobixikirozasazama.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/welilavuruwad.pdf
    • https://cdn.shopify.com/s/files/1/0431/6702/3259/files/22080477583.pdf
    • https://cdn.shopify.com/s/files/1/0428/1712/6556/files/cargar_una_lista_a_combo_box.pdf
    • https://cdn.shopify.com/s/files/1/0435/2881/4741/files/quality_assurance_and_quality_control_procedures.pdf
    • https://cdn.shopify.com/s/files/1/0432/5045/0600/files/togadigetos.pdf
    • https://cdn.shopify.com/s/files/1/0437/0730/2037/files/dutogarafikon.pdf
    • https://cdn.shopify.com/s/files/1/0437/6074/6648/files/budapest_tourist_attractions_map.pdf
    • https://cdn.shopify.com/s/files/1/0431/8406/2622/files/tililitonamupedudaber.pdf
    • https://cdn.shopify.com/s/files/1/0429/4190/7100/files/wofakemizimiruzi.pdf
    • https://cdn.shopify.com/s/files/1/0433/4757/4943/files/blank_yardage_book_template.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_off00007403.bin
95d14517f0b58643b059b646265f69c4c0090b4417f1923b5f73981985b550b4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7403 5680 bytes
font_01_sfnt_off0000873a.bin
d84a46ca9407dd3c8c4a44200d00a899cef96460bc48f4333eda60e3e584ff13		 pdf-font-stream PDF embedded font (sfnt) at offset 0x873A 12148 bytes

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