Malicious PDF — malware analysis report

Static analysis result for SHA-256 6271ad5dd748c8a6…

MALICIOUS

PDF

50.8 KB Created: 2020-08-15 01:05:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d9f0ca5ba4d4eedbc302e1e092a117b9 SHA-1: cbdca9d56c53179efba417cea052a1b2fa2fd3a2 SHA-256: 6271ad5dd748c8a63f4b06b2c83a228f3959bb8baebddf96377017441695c40d
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one critical heuristic identifying a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains the URL https://ttraff.ru/pify?keyword=oracle+gateway+for+sql+server, suggesting a lure to a malicious site disguised as technical documentation. The presence of many external PDF links further indicates a link farm or redirection scheme.

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=oracle+gateway+for+sql+server
    • http://mezuzan.thevillestudio.com/uploads/1/3/1/1/131164250/xafon_jivemediwef_bisafoxuneko_fulojasonux.pdf
    • http://files.mascomusic.org/uploads/1/3/1/4/131452953/4048401.pdf
    • http://wefuso.lancerdevault.com/uploads/1/3/0/7/130776525/b83c7a.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/5456/3477/files/36216212607.pdf
    • https://cdn.shopify.com/s/files/1/0440/8436/3416/files/sewavorawefu.pdf
    • https://cdn.shopify.com/s/files/1/0428/9105/1161/files/91290605672.pdf
    • https://cdn.shopify.com/s/files/1/0432/1466/7936/files/bersa_thunder_380_manual.pdf
    • https://cdn.shopify.com/s/files/1/0431/5499/7402/files/90774081931.pdf
    • https://cdn.shopify.com/s/files/1/0428/7823/8886/files/business_driven_information_systems_3rd_edition_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0431/3631/9639/files/capacitance_of_parallel_plate_capacitor.pdf
    • https://cdn.shopify.com/s/files/1/0431/5788/0996/files/gaduzukupebazelopuzi.pdf
    • https://cdn.shopify.com/s/files/1/0441/0481/0648/files/credit_card_authorization_form_hyatt.pdf
    • https://cdn.shopify.com/s/files/1/0431/4670/7104/files/nebabipexefab.pdf
    • https://cdn.shopify.com/s/files/1/0430/6763/7922/files/zajexusiwexosiv.pdf
    • https://cdn.shopify.com/s/files/1/0430/1075/2663/files/minecraft_spawn_rules.pdf
    • https://cdn.shopify.com/s/files/1/0435/3989/0327/files/vavuzixu.pdf
    • https://cdn.shopify.com/s/files/1/0432/6375/4404/files/55323457566.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_off000082ff.bin
2678e368677e62c0794cb8054693c1bf9916958aca3155eb9290bd685ce9fc83		 pdf-font-stream PDF embedded font (sfnt) at offset 0x82FF 5456 bytes
font_01_sfnt_off000095bb.bin
22bb8542f8de2ffe41cf89840ba116108dcf4b077ee078106a618b1b77b3c6d1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x95BB 12432 bytes

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