Malicious PDF — malware analysis report

Static analysis result for SHA-256 f513a72038ff4e69…

MALICIOUS

PDF

45.6 KB Created: 2020-08-24 08:27:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fd554d6f701d02489e6f110824f6233b SHA-1: 3a7f18c1478a07dd6b5661b98fc63b3f7519c45b SHA-256: f513a72038ff4e69b8f5ec7836db46f57c7b1e0e2f8cf1a03722ffe1ecf9b81a
152 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to external PDF files, creating a link farm. One critical heuristic identified a link to a known malicious redirector infrastructure at 'ttraff.cc'. The document body, though heavily obfuscated, contains references to 'industrialcraft 2 starter guide' and the URLs, suggesting a lure to trick users into clicking malicious links. The ML classifier strongly supports the malicious verdict.

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/pify?keyword=industrialcraft+2+starter+guide
    • http://files.fdmolinares.com/uploads/1/3/1/3/131380083/bawugiserel-refopudolela-rarowusopaxav.pdf
    • http://luwur.ksupayroll.com/uploads/1/3/0/8/130813528/sudelu-xelotezuremoxa-sibapu.pdf
    • http://nenodu.superiorgroundservices.com/uploads/1/3/1/4/131454373/pimof_fexupaduxuxa_temazud.pdf
    • http://lakizokov.mikeshanksportfolio.com/uploads/1/3/1/3/131380005/ludumawixole.pdf
    • http://files.gameoncustomglass.com/uploads/1/3/1/0/131071043/7432636.pdf
    • https://cdn.shopify.com/s/files/1/0430/3765/5193/files/mips_merge_sort.pdf
    • https://cdn.shopify.com/s/files/1/0439/3077/9816/files/bass_guitar_tab_template.pdf
    • https://cdn.shopify.com/s/files/1/0431/1787/1255/files/84623274043.pdf
    • https://cdn.shopify.com/s/files/1/0430/2487/5674/files/23697233013.pdf
    • https://cdn.shopify.com/s/files/1/0431/4339/7525/files/axar_publication_english_grammar.pdf
    • https://cdn.shopify.com/s/files/1/0436/6240/9881/files/alternative_spellings_for_ai_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0431/1161/2572/files/tecnicas_de_aprendizaje_autonomo.pdf
    • https://cdn.shopify.com/s/files/1/0430/0649/2823/files/android_camera_surfaceview_github.pdf
    • https://cdn.shopify.com/s/files/1/0434/6154/2054/files/1999_toyota_tacoma_repair_manual.pdf
    • https://cdn.shopify.com/s/files/1/0431/1734/6976/files/24790114572.pdf
    • https://cdn.shopify.com/s/files/1/0465/5785/5894/files/xodunuzel.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/1/0431/4339/7525/files/axar_publication_english_grammar

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006ae2.bin
cffc6fd75bb376f59a99226de0c55d3d5a834b5396d5f976c99637b6b4c2b36e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6AE2 5256 bytes
font_01_sfnt_off00007cc3.bin
eee93e0b6879f87fe9c8372c3b694d2d29fe1ae51fa042ddebb04b3c0f8f9636		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7CC3 14156 bytes

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