Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f1b6bfcacbc5416…

MALICIOUS

PDF

45.7 KB Created: 2020-08-09 21:39:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7cc901dd891c928394cd46de58311d7b SHA-1: af9f5bb7b86894fe798e4a85d65a605e4c9e15e1 SHA-256: 6f1b6bfcacbc5416250a73f60ba39a45d5f2dc444d83614e24f7eb6c4eafab68
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to external PDF files, suggesting a link farm or SEO manipulation tactic. One critical heuristic identified a redirector link to 'ttraff.cc', indicating a malicious redirection attempt. The ML classifier strongly supports the malicious verdict. Although no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a malicious document designed to redirect users to potentially harmful content.

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=aspirina+durante+el+embarazo+pdf
    • http://files.cabogoldens.com/uploads/1/3/1/4/131482991/8513908.pdf
    • http://nizeroto.livingessencestudio.com/uploads/1/3/1/6/131606490/f58e645.pdf
    • http://files.uthrive-in-unity.com/uploads/1/3/1/4/131406999/6005670.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0427/6987/5111/files/80354942964.pdf
    • https://cdn.shopify.com/s/files/1/0429/5013/1878/files/81388944395.pdf
    • https://cdn.shopify.com/s/files/1/0434/8788/7526/files/currency_act_1965.pdf
    • https://cdn.shopify.com/s/files/1/0430/7222/5442/files/56035130853.pdf
    • https://cdn.shopify.com/s/files/1/0430/3906/4225/files/88307798719.pdf
    • https://cdn.shopify.com/s/files/1/0430/8611/9079/files/dowekazego.pdf
    • https://cdn.shopify.com/s/files/1/0435/7573/8527/files/negative_adjectives_with_prefixes_un_in_im.pdf
    • https://cdn.shopify.com/s/files/1/0436/0696/6429/files/33788988451.pdf
    • https://cdn.shopify.com/s/files/1/0437/2588/1498/files/como_acoplar.pdf
    • https://cdn.shopify.com/s/files/1/0432/4186/5384/files/64210683552.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000064c8.bin
452ad0d9a9964f61e9b8e4945288013f6ef06cdfe6bd5755dc278ece6302db1f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x64C8 5248 bytes
font_01_sfnt_off0000767d.bin
725a45870f86d099ce2b7f535225b3c50bc92ce07003dfbbd81cbc53639fd21e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x767D 11388 bytes
font_02_sfnt_off00009bbb.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9BBB 4324 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.