Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a2e314245d9c294…

MALICIOUS

PDF

36.9 KB Created: 2020-08-21 22:59:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9c47458510ea081113104620be3f27ff SHA-1: b90a55586a838896a5d219f2c06b5a76a6dcb42f SHA-256: 0a2e314245d9c294512970920fc2320df656340a846cd728913a0809d9fe2190
162 Risk Score

Malware Insights

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

The PDF document contains a large number of embedded links, many of which point to external PDF files, suggesting a link farm or SEO manipulation tactic. One of the primary links, 'https://ttraff.com/pify?keyword=cd+cover+template+ai', is flagged as a malicious redirector. The document body, though heavily obfuscated, contains this URL and other Shopify links, indicating a potential attempt to drive traffic or distribute further malicious content. The ML classifier strongly flagged this PDF as malicious.

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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.com/pify?keyword=cd+cover+template+ai
    • http://files.jennifergrayolson.com/uploads/1/3/1/6/131606435/winikagotux-puvam.pdf
    • http://xujis.definir.co.uk/uploads/1/3/0/8/130874676/sesod.pdf
    • http://vifir.calbrackin.com/uploads/1/3/1/6/131637562/fegoradetugowumol.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0445/6418/5247/files/ashrae_hvac_systems_and_equipment_handbook.pdf
    • https://cdn.shopify.com/s/files/1/0430/9693/2505/files/basic_concepts_of_computer_science_engineering.pdf
    • https://cdn.shopify.com/s/files/1/0431/9933/2516/files/mysql_workbench_tutorial_beginners.pdf
    • https://cdn.shopify.com/s/files/1/0434/1540/4711/files/quraner_alo.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/52657742202.pdf
    • https://cdn.shopify.com/s/files/1/0448/6791/1842/files/chaupai_sahib_nanaksar.pdf
    • https://cdn.shopify.com/s/files/1/0437/9269/5456/files/fibinogeduvotuwizopited.pdf
    • https://cdn.shopify.com/s/files/1/0431/2816/0417/files/18135275499.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/49186839350.pdf
    • https://cdn.shopify.com/s/files/1/0433/7922/8837/files/vomebavukokosawoz.pdf
    • https://cdn.shopify.com/s/files/1/0438/3254/1344/files/jibosubesumamoligow.pdf
    • https://cdn.shopify.com/s/files/1/0432/6827/6384/files/bsmrstu_circular_2020_20.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_off0000552f.bin
53547ef906ae9b32a988ac4b06f52dc8c356b2b08dc3a2bb4783af72905f4a64		 pdf-font-stream PDF embedded font (sfnt) at offset 0x552F 5004 bytes
font_01_sfnt_off0000661b.bin
79be625072052266aa98a16b8d475ba84ecfc13f0fcf70ea88b5bc18dfa522c8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x661B 9572 bytes

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