Malicious PDF — malware analysis report

Static analysis result for SHA-256 76380ad704a06ddb…

MALICIOUS

PDF

48.0 KB Created: 2020-08-07 21:24:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 25cabf1243b20233ac591907f7817dc6 SHA-1: 61d2af3f43aca281847b750697679d593095602b SHA-256: 76380ad704a06ddbb9320cc251d1245c220e10e4c96db794cc263e256cdb6c6e
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, with one specifically identified as a malicious redirector. The document body text, though garbled, includes the target URL, suggesting a lure to external content. The presence of a link farm and a malicious redirector indicates an attempt to drive traffic to potentially harmful 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=article+a+an+the+worksheet+pdf
    • http://files.yin-tang-therapies.com/uploads/1/3/1/3/131384424/dodinadoseravo.pdf
    • http://files.beyondessentialoil.com/uploads/1/3/0/7/130738657/4845869.pdf
    • http://files.lafayetterealestatehomes.com/uploads/1/3/1/3/131380177/587e264d.pdf
    • http://pimaki.spanishduluth.com/uploads/1/3/1/0/131070331/814f958a4.pdf
    • http://files.casciabooks.com/uploads/1/3/1/4/131452799/tazuloguk.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/2854/5693/files/79924246122.pdf
    • https://cdn.shopify.com/s/files/1/0437/1690/3080/files/60252700254.pdf
    • https://cdn.shopify.com/s/files/1/0429/9823/5289/files/understanding_operating_systems_6th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0437/4839/3112/files/ata_hyperthyroidism_guidelines.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/78394199391.pdf
    • https://cdn.shopify.com/s/files/1/0438/1219/2413/files/73668874427.pdf
    • https://cdn.shopify.com/s/files/1/0432/3203/4980/files/patedadajukuraxanu.pdf
    • https://cdn.shopify.com/s/files/1/0433/8660/1635/files/browser_object_model_in_javascript.pdf
    • https://cdn.shopify.com/s/files/1/0433/1202/1657/files/48613877177.pdf
    • https://cdn.shopify.com/s/files/1/0435/4870/4917/files/bogota_turismo.pdf
    • https://cdn.shopify.com/s/files/1/0430/0141/3795/files/beauty_and_the_beast_piano_sheet_music_easy.pdf
    • https://cdn.shopify.com/s/files/1/0432/7732/0348/files/xewejuvuzilulokubenij.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_off000075e0.bin
81e250f2280151e09e9e498a328b7f00b7e61da6a0c906a19a2a1be83b2a2862		 pdf-font-stream PDF embedded font (sfnt) at offset 0x75E0 5388 bytes
font_01_sfnt_off0000883f.bin
d8b29a27b0919e0e29cf7e09033710e035d9794d3ca5c0c1b7acec779e23b6e7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x883F 13280 bytes

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