Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb78bb4f1229e0d5…

MALICIOUS

PDF

47.0 KB Created: 2020-08-30 15:45:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2c61424beff7735dc9e6e0b7d2d55128 SHA-1: ba12a2fc0c9cb73aa18fddc6f3b04cc779d9d71b SHA-256: eb78bb4f1229e0d572fa9d3914f06aaacd9f749f5fbb147da6fc29468341231e
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF document was flagged as malicious by an ML classifier and contains a critical heuristic indicating it links to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains the URL https://ttraff.cc/wix?keyword=fida+movie+songs+free+download+naa+songs, which is also present in the extracted URLs and flagged as malicious. Additionally, the PDF contains a link farm with numerous external links, many pointing to Shopify domains, suggesting an attempt to obscure the true malicious destination or to leverage legitimate platforms for distribution.

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/wix?keyword=fida+movie+songs+free+download+naa+songs
    • https://cdn.shopify.com/s/files/1/0431/0607/4778/files/biogas_plant_project_for_students.pdf
    • https://cdn.shopify.com/s/files/1/0428/6945/7063/files/97129923422.pdf
    • https://cdn.shopify.com/s/files/1/0431/6656/4507/files/bopexexudilebimirenujinen.pdf
    • https://cdn.shopify.com/s/files/1/0434/4214/3397/files/67124142472.pdf
    • https://cdn.shopify.com/s/files/1/0434/7595/9973/files/chernobyl_free_season_1.pdf
    • https://cdn.shopify.com/s/files/1/0427/4988/6620/files/bivufujuzomavig.pdf
    • https://cdn.shopify.com/s/files/1/0432/5310/4790/files/64726877230.pdf
    • https://cdn.shopify.com/s/files/1/0431/7832/8221/files/kagezukusirikozoduroxeli.pdf
    • https://cdn.shopify.com/s/files/1/0431/1020/3556/files/instrumentation_and_control_books_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0429/9417/2058/files/pozoluxutemozala.pdf
    • https://cdn.shopify.com/s/files/1/0429/0553/4620/files/jixizotabozezuzabemekit.pdf
    • https://cdn.shopify.com/s/files/1/0462/2444/1498/files/saniveg.pdf
    • https://cdn.shopify.com/s/files/1/0431/3127/3370/files/tirimamipateduxu.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005d35.bin
e5611b3403b8c19ea32c07722e5f4809aa6221b64a139ee38169f581170c140b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5D35 5040 bytes
font_01_sfnt_off00006e4d.bin
3e8c8e235de4d3722f222faa9efcfa11acb0631111122e506bf725709ce03c10		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E4D 4144 bytes
font_02_sfnt_off00007dc2.bin
80779e7d6a1176f2b74168f6fb8fd262c26a71cad854fe236120e07555307222		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7DC2 10172 bytes
font_03_sfnt_off0000a060.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA060 4324 bytes

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