Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d9478d3f6622a2e…

MALICIOUS

PDF

53.1 KB Created: 2020-08-25 22:46:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 317ba734518c20c0b282987d4d7a9f39 SHA-1: 997f257dce4574bc07a63580f3ace483a1676270 SHA-256: 2d9478d3f6622a2e24347524d776dbc207b99f9242bac162b222f4c4a85968e0
152 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links, with one heuristic specifically identifying it as a malicious redirector and another as a link farm. The primary malicious URL identified is https://ttraff.cc/pify?keyword=some+assembly+required+ffxiv, which likely serves as a gateway to further malicious content. The document body, though heavily obfuscated, also contains this URL, reinforcing its role in the attack. The presence of numerous other PDF links suggests a strategy to distribute malicious content widely or manipulate search engine results.

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=some+assembly+required+ffxiv
    • http://files.coroaustral.org/uploads/1/3/2/3/132303099/5016795.pdf
    • http://kufenaxew.dimage.com.sg/uploads/1/3/1/4/131408100/5679370.pdf
    • http://files.thesemi-finalist.com/uploads/1/3/1/4/131407552/61fceb.pdf
    • http://files.dtmgt.com/uploads/1/3/1/4/131407737/4811695.pdf
    • http://files.codeofbehaviour.com/uploads/1/3/1/3/131398177/mosetobogi_milivuku.pdf
    • https://cdn.shopify.com/s/files/1/0431/0643/5232/files/50467323916.pdf
    • https://cdn.shopify.com/s/files/1/0434/9480/1568/files/56612372418.pdf
    • https://cdn.shopify.com/s/files/1/0432/8652/8164/files/ubuntu_boot_full.pdf
    • https://cdn.shopify.com/s/files/1/0439/9611/9198/files/automobile_companies_in_chennai.pdf
    • https://cdn.shopify.com/s/files/1/0435/1610/0776/files/bubble_shooter_3_game_for_pc.pdf
    • https://cdn.shopify.com/s/files/1/0460/2216/4639/files/85935531403.pdf
    • https://cdn.shopify.com/s/files/1/0429/5471/9395/files/clinical_biochemistry.pdf
    • https://cdn.shopify.com/s/files/1/0433/9403/9975/files/2695879512.pdf
    • https://cdn.shopify.com/s/files/1/0437/1687/0298/files/what_is_affirmative_action.pdf
    • https://cdn.shopify.com/s/files/1/0432/5575/9011/files/total_gym_workout_routine.pdf
    • https://cdn.shopify.com/s/files/1/0437/8332/3800/files/appointment_letter_format_for_area_sales_manager.pdf
    • https://cdn.shopify.com/s/files/1/0431/4241/4493/files/cricket_ball_size_guide.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_off00008fe6.bin
3d8f860cd36dcfa6d850a348244c12a99b1669ce73ce6363e39ad676449c17c8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8FE6 5652 bytes
font_01_sfnt_off0000a308.bin
5c924f8bf7421c12c34028561dad7207df7f5dfb27637ad30e8349be2b1e0c70		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA308 10736 bytes

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