Malicious PDF — malware analysis report

Static analysis result for SHA-256 138dbfa4a3180990…

MALICIOUS

PDF

44.5 KB Created: 2020-08-09 18:38:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3efee4efcee9c5add63205932a6b7f12 SHA-1: d5af018925c90d799bf0401e9adc577d6fb2e2a3 SHA-256: 138dbfa4a318099072206fa9da5397ad48cedea745f9eb5662a877cc664e794e
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains numerous embedded links, including one pointing to a known malicious redirector. The document body, though heavily obfuscated, contains text suggesting a lure related to 'Banting recipes pdf'. The presence of a large number of external PDF links indicates a link farm or SEO manipulation tactic, likely intended to drive traffic to malicious sites.

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=banting+recipes+pdf
    • http://files.orthodoxservantleaders.com/uploads/1/3/1/4/131407552/redibafemejuxi_vudovirabax.pdf
    • http://files.connect4faith.org/uploads/1/3/1/3/131380263/fomokasafef-niluduroduki.pdf
    • http://files.capefalconkayaks.com/uploads/1/3/1/4/131453618/c99b305923.pdf
    • http://files.pack50cubs.org/uploads/1/3/1/4/131453060/zafaduwori-badegu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/5433/3093/files/68588136426.pdf
    • https://cdn.shopify.com/s/files/1/0432/4923/8184/files/xujivazedujised.pdf
    • https://cdn.shopify.com/s/files/1/0430/0495/2735/files/winenojemafefetekidedovo.pdf
    • https://cdn.shopify.com/s/files/1/0437/3757/9674/files/fax_cover_sheet_free.pdf
    • https://cdn.shopify.com/s/files/1/0432/2567/7982/files/lasanasigujaxulefiberepip.pdf
    • https://cdn.shopify.com/s/files/1/0433/0982/6213/files/60794677198.pdf
    • https://cdn.shopify.com/s/files/1/0429/0835/2679/files/home_buying_process_flowchart.pdf
    • https://cdn.shopify.com/s/files/1/0434/1052/2277/files/buzesuloxekof.pdf
    • https://cdn.shopify.com/s/files/1/0429/6772/8279/files/acute_pancreatitis_scoring_systems.pdf
    • https://cdn.shopify.com/s/files/1/0430/5040/1945/files/nezijugukagoj.pdf
    • https://cdn.shopify.com/s/files/1/0440/4042/1541/files/8_weeks_to_sealfit.pdf
    • https://cdn.shopify.com/s/files/1/0433/7532/9441/files/asymptote_of_hyperbola.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_off00006f64.bin
98de7516fd9930b4330a8282ec2fb804839b17c7c32e1fad99b57e3547e66260		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F64 5340 bytes
font_01_sfnt_off000081a2.bin
c1322cc5846800d455cb1c8b8e62641d143664b7483ab87e16356acbe53bdf57		 pdf-font-stream PDF embedded font (sfnt) at offset 0x81A2 10384 bytes

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