Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad264b0b6bc2e328…

MALICIOUS

PDF

45.9 KB Created: 2020-08-26 23:43:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f47f5a0eec9bfe647423430128feefce SHA-1: 07c7f230717e25a6bf622ae9c5fc3b899ca60955 SHA-256: ad264b0b6bc2e3286fad6475fe3bc0844f8115baeb4e1f5cba64a848a7a72708
152 Risk Score

Malware Insights

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

The PDF was flagged by multiple critical heuristics for containing malicious redirector links and a large number of external PDF links, indicating a link farm. The ML classifier also strongly indicated maliciousness. The primary malicious URL identified is https://ttraff.cc/pify?keyword=just+basic+commands, which is likely used to redirect users to further malicious content. The document body contains garbled text but also includes the primary malicious URL and several other PDF links hosted on Shopify and other domains.

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=just+basic+commands
    • http://disafe.giseleharrison.com/uploads/1/3/2/6/132680869/1856417.pdf
    • http://files.staceymyshack.com/uploads/1/3/1/6/131607093/5794127.pdf
    • http://files.whitehorsevenue.com/uploads/1/3/1/4/131483009/5515ac98.pdf
    • https://cdn.shopify.com/s/files/1/0431/6351/7092/files/xogejexobuwovaru.pdf
    • https://cdn.shopify.com/s/files/1/0433/3725/3023/files/super_mario_all_stars_online.pdf
    • https://cdn.shopify.com/s/files/1/0435/2399/7856/files/10137706601.pdf
    • https://cdn.shopify.com/s/files/1/0439/5086/6590/files/all_i_want_for_christmas_is_you_piano_notes.pdf
    • https://cdn.shopify.com/s/files/1/0432/2036/9576/files/political_regions_of_the_world.pdf
    • https://cdn.shopify.com/s/files/1/0429/7841/0655/files/gotitoxubejavopivo.pdf
    • https://cdn.shopify.com/s/files/1/0427/9051/8940/files/11916153636.pdf
    • https://cdn.shopify.com/s/files/1/0428/7699/3695/files/78308005279.pdf
    • https://cdn.shopify.com/s/files/1/0434/2421/9293/files/mokulabajimigefesonosu.pdf
    • https://cdn.shopify.com/s/files/1/0428/8210/5511/files/26899136195.pdf
    • https://cdn.shopify.com/s/files/1/0429/5812/7270/files/algebra_functions_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0440/1207/7206/files/72379611332.pdf
    • https://cdn.shopify.com/s/files/1/0464/6735/0680/files/reading_plus_answers_level_f_ulysses.pdf
    • https://cdn.shopify.com/s/files/1/0430/3778/6266/files/42390360176.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_off000073f7.bin
3764575895639bdb7f9ebddc7a3bdfb5fbd740f86521f054d5714ee7b59698f4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x73F7 5088 bytes
font_01_sfnt_off00008526.bin
b90d951b2bf0abdce180faae24b0b8f56f96aae28a984425cf1a52341ba15991		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8526 10712 bytes

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