Malicious PDF — malware analysis report

Static analysis result for SHA-256 d8532b5d99b92986…

MALICIOUS

PDF

40.1 KB Created: 2020-08-25 11:21:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ea0a4de5ed73b6498b34dfcf1cef9829 SHA-1: 03e6feeaea14da04597edbf65a5f74d04a247333 SHA-256: d8532b5d99b929864777325d4c784c2a389c4edd6940c81046e678ed76c80a79
154 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, specifically pointing to 'ttraff.ru' with a keyword suggesting a lure related to iCloud for PC. The document body, though heavily obfuscated, contains the same URL and a similar keyword, reinforcing the phishing pretext. The presence of a large number of embedded links, many pointing to Shopify, suggests a link farm used for SEO poisoning or to obscure the malicious redirector. No scripts were extracted from this sample.

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.ru/pify?keyword=can%2527+t++icloud+for+pc
    • http://rijig.ebyogi.com/uploads/1/3/1/3/131380213/gevabogulax-jotinodi-sufutesepipubu.pdf
    • http://faxud.istanbulsanatlayasam.org/uploads/1/3/1/4/131454215/855119.pdf
    • https://cdn.shopify.com/s/files/1/0430/7143/9001/files/catechism_of_the_catholic_church_compendium.pdf
    • https://cdn.shopify.com/s/files/1/0433/9499/0231/files/rafinupig.pdf
    • https://cdn.shopify.com/s/files/1/0447/1803/1002/files/big_data_analytics_ppt_template.pdf
    • https://cdn.shopify.com/s/files/1/0437/2643/8550/files/muruwira.pdf
    • https://cdn.shopify.com/s/files/1/0432/5372/7394/files/votajevonatatif.pdf
    • https://cdn.shopify.com/s/files/1/0431/2373/6725/files/mesedukisok.pdf
    • https://cdn.shopify.com/s/files/1/0429/1392/3228/files/76621562089.pdf
    • https://cdn.shopify.com/s/files/1/0433/4016/9384/files/sepivig.pdf
    • https://cdn.shopify.com/s/files/1/0430/3667/2162/files/jebazagonog.pdf
    • https://cdn.shopify.com/s/files/1/0438/0976/7584/files/37923111306.pdf
    • https://cdn.shopify.com/s/files/1/0432/4065/2960/files/lalugepawibuwiweboxivako.pdf
    • https://cdn.shopify.com/s/files/1/0434/7805/7122/files/zogeg.pdf
    • https://cdn.shopify.com/s/files/1/0437/4550/9537/files/all_bank_exam_syllabus_2020_download.pdf
    • https://cdn.shopify.com/s/files/1/0427/7121/8588/files/14768021312.pdf
    • https://cdn.shopify.com/s/files/1/0434/3329/6028/files/sosarigitawal.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/
    • https://cdn.shopify.com/s/files/1/0431/2373

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000060d5.bin
e537a8d372c2e578d88a7472f8916309497ed696560a9b6a0e4ccfcf4a6ca575		 pdf-font-stream PDF embedded font (sfnt) at offset 0x60D5 4908 bytes
font_01_sfnt_off00007199.bin
5b2b29b9d3a0f4cb5956e9689c5c913b850044eea2e2d81c9a1bfc83d443774f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7199 9868 bytes

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