Malicious PDF — malware analysis report

Static analysis result for SHA-256 17de669ca626eba2…

MALICIOUS

PDF

63.7 KB Created: 2020-08-25 04:07:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d9c6fd1cd5f2380f01ddfc3c9256e2bf SHA-1: 5dd9d4f25f60ba53ba195036ff965dac2f4a4b54 SHA-256: 17de669ca626eba252613bb2795c2c2b46f47147e8c8efae21e51de3b88b8a2d
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains a lure related to 'Yandex music fisher android' and embeds multiple links, one of which points to known malicious redirector infrastructure. The heuristic 'SE_BROWSER_INSTALL_LURE' suggests the document aims to trick the user into installing something, which is a common social-engineering tactic. The presence of numerous links, including one to a malicious redirector, indicates an attempt to lead the user to a compromised site.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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=yandex+music+fisher+android
    • http://files.mixartists.org/uploads/1/3/0/7/130739112/8742614.pdf
    • http://files.sjhsasb.com/uploads/1/3/1/3/131379439/cd87a7eade.pdf
    • http://files.mx.reinventing-reality.com/uploads/1/3/1/8/131871816/62ede0c1.pdf
    • http://files.yucatancustomfurniture.com/uploads/1/3/0/9/130969548/zagivebiwaw.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0429/2775/1321/files/68923979955.pdf
    • https://cdn.shopify.com/s/files/1/0434/4958/1724/files/xodijazo.pdf
    • https://cdn.shopify.com/s/files/1/0429/4665/8463/files/introduction_to_computational_mathematics_xin_she_yang.pdf
    • https://cdn.shopify.com/s/files/1/0429/6717/1223/files/90162233271.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/61047377128.pdf
    • https://cdn.shopify.com/s/files/1/0428/5625/1555/files/likokulifolimurozokubiw.pdf
    • https://cdn.shopify.com/s/files/1/0431/9117/3278/files/new_sepsis_guidelines_2018.pdf
    • https://cdn.shopify.com/s/files/1/0463/2536/6945/files/undertale_asgore_fight.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/jidaxuno.pdf
    • https://cdn.shopify.com/s/files/1/0430/6049/4490/files/68683052779.pdf
    • https://cdn.shopify.com/s/files/1/0428/9314/8313/files/android_apps_not_installed_after_reboot.pdf
    • https://cdn.shopify.com/s/files/1/0432/1270/1860/files/49391207404.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000a6a2.bin
33b005874f8a25c188caffefd607527324d6f02c2dd66f99e4dbd5650abc2c0c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA6A2 5060 bytes
font_01_sfnt_off0000b78c.bin
51ebeec29509b87aa858d500e37ac8853184703d07d1f913ce36d8e1dc7764c0		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB78C 1800 bytes
font_02_sfnt_off0000c01a.bin
e2f092687be4c383556f2107c3b69df2aa10355948854e82bb3e9569f28d233a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC01A 10164 bytes
font_03_sfnt_off0000e2ef.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE2EF 4324 bytes

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