Malicious PDF — malware analysis report

Static analysis result for SHA-256 db25d33ec9c82dcf…

MALICIOUS

PDF

37.2 KB Created: 2020-08-25 01:11:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 12c0e44f555d3178d29ba385852dcd69 SHA-1: e8f54bd5c03dfec03194e84e14e4e3178099d998 SHA-256: db25d33ec9c82dcfc689f2220f5a6c13ef8b7c5f66ad5b5be97d7d208d1c149c
152 Risk Score

Malware Insights

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

This PDF file contains numerous embedded links, forming a link farm, and a critical redirector link to ttraff.com. The document body, though heavily obfuscated, contains text related to 'grid map coordinates worksheet' and the malicious URL, suggesting a lure to trick users into clicking the link. The ML classifier also strongly indicated maliciousness. The primary attack vector appears to be directing users to malicious infrastructure via a deceptive document.

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.com/pify?keyword=grid+map+coordinates+worksheet
    • http://files.mackspaintandbodyshop.com/uploads/1/3/1/3/131380177/ac50f.pdf
    • http://wofipele.theexpatspeechie.com/uploads/1/3/1/3/131381241/rofisejeben-gogumefovot-zusuzuwolujenu-foromudovu.pdf
    • http://files.samahdi.com/uploads/1/3/1/1/131164063/2328002.pdf
    • http://files.stephanierupp.org/uploads/1/3/0/8/130813317/bejipojexetiwar.pdf
    • https://cdn.shopify.com/s/files/1/0434/0590/1991/files/standard_equation_of_hyperbola_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0433/8342/3126/files/70195758100.pdf
    • https://cdn.shopify.com/s/files/1/0431/7003/7917/files/jisileriw.pdf
    • https://cdn.shopify.com/s/files/1/0433/9813/5966/files/metuxubaxinafusaxizexo.pdf
    • https://cdn.shopify.com/s/files/1/0432/4258/6269/files/95025191926.pdf
    • https://cdn.shopify.com/s/files/1/0434/2539/8945/files/zekaxixabugunariwevini.pdf
    • https://cdn.shopify.com/s/files/1/0428/0349/5071/files/tiforosun.pdf
    • https://cdn.shopify.com/s/files/1/0427/5198/3783/files/87132340383.pdf
    • https://cdn.shopify.com/s/files/1/0457/8816/8358/files/critical_reasoning_gmat_questions_and_answers.pdf
    • https://cdn.shopify.com/s/files/1/0429/9243/5359/files/dch_file_ting_anh_sang_ting_vit_online.pdf
    • https://cdn.shopify.com/s/files/1/0427/9199/3500/files/75618603702.pdf
    • https://cdn.shopify.com/s/files/1/0434/6881/6544/files/16437387469.pdf
    • https://cdn.shopify.com/s/files/1/0428/5808/6556/files/31994802012.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_off0000524d.bin
6c6e99a0cc7c989c4ced57be04c8d4a0b703dbcf02e74d452a1b5f89f9870e16		 pdf-font-stream PDF embedded font (sfnt) at offset 0x524D 5468 bytes
font_01_sfnt_off000064ce.bin
c56ae02df747417771a3b4b10aaed815712e43d45d86e4490c5cda34bf934712		 pdf-font-stream PDF embedded font (sfnt) at offset 0x64CE 10380 bytes

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