Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe079b96b497b233…

MALICIOUS

PDF

46.4 KB Created: 2020-07-28 22:04:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0ab32e35549690cdb2be100dc95e9b1a SHA-1: b153d4f7e5fac3b72411269808815a4043619574 SHA-256: fe079b96b497b2339ed41284627a407c1752fc93dbfd15f4049f520f8a3e97ef
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains numerous embedded links, with a critical heuristic firing indicating a link to known malicious redirector infrastructure. Another critical heuristic identified a PDF link farm, with 19 external PDF links embedded. The ML classifier also strongly indicated maliciousness. The document body contains text related to 'Archery master 3d mod apk unlimited money', suggesting a lure for potentially unwanted software or malware.

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=archery+master+3d+mod+apk+unlimited+money
    • http://files.mealessential.com/uploads/1/3/1/4/131482867/balanepobap-bixuwajoluzigu-xeniwinusajix.pdf
    • http://files.solutionsforenergy.co.uk/uploads/1/3/1/3/131384663/6574553.pdf
    • http://files.katzkupcakes.com/uploads/1/3/0/8/130813913/5689945.pdf
    • http://files.jahafrica.com/uploads/1/3/1/4/131438539/tikifoporeba.pdf
    • https://cdn.shopify.com/s/files/1/0431/7839/3749/files/xuporesal.pdf
    • https://cdn.shopify.com/s/files/1/0434/3349/2641/files/jejasozukuwenupanuvogadij.pdf
    • https://cdn.shopify.com/s/files/1/0434/3509/8264/files/najumik.pdf
    • https://cdn.shopify.com/s/files/1/0432/0513/2456/files/naduz.pdf
    • https://cdn.shopify.com/s/files/1/0431/0702/5056/files/13945086613.pdf
    • https://cdn.shopify.com/s/files/1/0434/0095/4021/files/36971099225.pdf
    • https://cdn.shopify.com/s/files/1/0435/5486/5320/files/nebije.pdf
    • https://cdn.shopify.com/s/files/1/0437/2522/6152/files/vatanef.pdf
    • https://cdn.shopify.com/s/files/1/0437/3898/8709/files/42205720429.pdf
    • https://cdn.shopify.com/s/files/1/0435/1829/6232/files/90429025616.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/1297022614.pdf
    • https://cdn.shopify.com/s/files/1/0430/6331/2533/files/tokojulufajixixexevoro.pdf
    • https://cdn.shopify.com/s/files/1/0433/0032/3478/files/romosan.pdf
    • https://cdn.shopify.com/s/files/1/0428/1863/3894/files/12098213052.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/norojakibi.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007608.bin
a71f2e60cb50e733506036baa6ab82826bdf9f1b3afb0cb7b58e2beef8611f02		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7608 5512 bytes
font_01_sfnt_off00008894.bin
5a2432bfd9167841f3417c90a0b392d372fea6eb8912a8c2a1eb9d7e87cc0db3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8894 10380 bytes

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