Malicious PDF — malware analysis report

Static analysis result for SHA-256 0da7d6491402a89a…

MALICIOUS

PDF

43.1 KB Created: 2020-08-21 08:21:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9c301b4abfdcb82d035afcff35786c3c SHA-1: e1d20e0d1abec3a62304a8d57d6f2ea4d106698d SHA-256: 0da7d6491402a89a18cef3fe606e9c763c287a48682be85fa0df769f19eb8455
162 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.ru, which is likely used to obscure the final destination of the malicious payload. The document body, though partially corrupted, contains the same lure text as the malicious URL, suggesting a social engineering attempt to trick the user into clicking the link. The presence of numerous other PDF links, many hosted on Shopify, indicates a link farm strategy to improve SEO and distribute the malicious content.

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.ru/pify?keyword=design+portfolio+template+indesign+free
    • http://files.humboldtcountychamber.com/uploads/1/3/1/4/131453623/sojodobar.pdf
    • http://kedogogo.prairieskycreations.ca/uploads/1/3/0/8/130873826/7361011.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0439/9346/4990/files/usgs_earthquake_design_maps_summary_report.pdf
    • https://cdn.shopify.com/s/files/1/0429/0212/6751/files/51381181385.pdf
    • https://cdn.shopify.com/s/files/1/0429/7257/7946/files/talipexorupopitutijidu.pdf
    • https://cdn.shopify.com/s/files/1/0429/8244/1113/files/rusilesudaguxudekolego.pdf
    • https://cdn.shopify.com/s/files/1/0440/8705/0390/files/35140632869.pdf
    • https://cdn.shopify.com/s/files/1/0437/6294/2101/files/bacterias_aerobias_e_anaerobias.pdf
    • https://cdn.shopify.com/s/files/1/0438/6881/5528/files/curriculum_for_agricultural_science_education_answer_key.pdf
    • https://cdn.shopify.com/s/files/1/0428/7247/1718/files/madoka_magica_decretum_piano_sheet_music.pdf
    • https://cdn.shopify.com/s/files/1/0437/3918/5303/files/88517038449.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_off00006a5f.bin
78948b15545be662187be5b890c3a6f1d35097dc72a643181fc705c2fd4f5c68		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A5F 5360 bytes
font_01_sfnt_off00007c7c.bin
7a9d405f0b02ab11b541ec9c1c875f8cdd45410cd5b1cefc82fcbaa311b20eb6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7C7C 10456 bytes

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