Malicious PDF — malware analysis report

Static analysis result for SHA-256 0262d1c8f7f83c31…

MALICIOUS

PDF

41.4 KB Created: 2020-08-08 13:13:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7741f588a4e74d027b44350644913b8a SHA-1: 3c3a9dd4f9d5a46fc931bd787af863dfb09fb49b SHA-256: 0262d1c8f7f83c31d9281da7f54218ee45e627a1f66a0f6fed6e17c1dddc622f
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document contains a large number of embedded links, many of which point to a link farm infrastructure designed to redirect users to malicious sites. The primary malicious URL identified is https://ttraff.cc/pify?keyword=causas+del+albinismo+pdf, which is flagged as a malicious redirector. The document's structure and content suggest an attempt to disguise malicious activity as legitimate information, likely as part of a phishing or scam campaign.

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=causas+del+albinismo+pdf
    • http://files.motorcitybrewtours.com/uploads/1/3/0/8/130815664/798675.pdf
    • http://zokoz.yahshuauniversity.com/uploads/1/3/2/6/132681670/wizanavule.pdf
    • http://files.paigelingo2021.com/uploads/1/3/2/6/132681488/9643159.pdf
    • http://files.vvtg.org/uploads/1/3/0/8/130813755/vavupofow.pdf
    • http://files.hkminimefencing.com/uploads/1/3/1/6/131606392/vapudu-xaxuxunodu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0439/9998/5822/files/paradise_lost_book_10.pdf
    • https://cdn.shopify.com/s/files/1/0433/6094/4296/files/exemple_de_cahier_de_charge_d_un_projet_informatique.pdf
    • https://cdn.shopify.com/s/files/1/0437/0392/6939/files/91389268551.pdf
    • https://cdn.shopify.com/s/files/1/0440/1872/9125/files/47146908506.pdf
    • https://cdn.shopify.com/s/files/1/0432/5530/0249/files/30106226823.pdf
    • https://cdn.shopify.com/s/files/1/0430/8356/3162/files/statistical_inference_for_data_science_by_brian_caffo.pdf
    • https://cdn.shopify.com/s/files/1/0430/7720/6178/files/2200564998.pdf
    • https://cdn.shopify.com/s/files/1/0434/5207/2089/files/49536408700.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/rewosegukedisupagur.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/51507598499.pdf
    • https://cdn.shopify.com/s/files/1/0428/5480/9756/files/46739129701.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_off00006219.bin
ec7aa8e5f2b2c72bd5743b23769c54e5341cf6dc4d771df46edb7cbce1f7448e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6219 5136 bytes
font_01_sfnt_off00007378.bin
377148cdca73b507c921ca8ffc85938128db768c80baba8cc0fd2abe54263b01		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7378 11076 bytes

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