Malicious PDF — malware analysis report

Static analysis result for SHA-256 a8178e3181355370…

MALICIOUS

PDF

42.7 KB Created: 2020-08-31 08:07:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2f4abb17ef02b8b542df036b94743159 SHA-1: ab7dde0d4e42fe457a2f62f51e791e84e0665d68 SHA-256: a8178e3181355370193491e9b908f1fa07511d3183bf3adaa178905ce8ddc987
152 Risk Score

Malware Insights

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

The PDF document contains a significant number of embedded links, forming a link farm hosted on Shopify. One of these links redirects to a known malicious domain, ttraff.com, indicating a phishing or redirection attempt. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted from this sample.

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/wix?keyword=the+anomaly+2014+full+movie
    • https://cdn.shopify.com/s/files/1/0437/3318/8762/files/93352484377.pdf
    • https://cdn.shopify.com/s/files/1/0462/2886/5175/files/runulojuzifosenebajulaba.pdf
    • https://cdn.shopify.com/s/files/1/0462/7221/7237/files/6335846086.pdf
    • https://cdn.shopify.com/s/files/1/0437/3561/3594/files/30479292097.pdf
    • https://cdn.shopify.com/s/files/1/0429/3342/0195/files/tikatadusa.pdf
    • https://cdn.shopify.com/s/files/1/0430/8392/3609/files/6396630958.pdf
    • https://cdn.shopify.com/s/files/1/0450/6225/8851/files/hallelujah_handel_organ.pdf
    • https://cdn.shopify.com/s/files/1/0436/9245/8139/files/39748531579.pdf
    • https://cdn.shopify.com/s/files/1/0429/1526/6713/files/28068970705.pdf
    • https://cdn.shopify.com/s/files/1/0427/8868/3932/files/spoken_english_lessons_in_sinhala_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0438/2133/4688/files/canon_eos_750d_manual.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_off000068c6.bin
86117a7bd9571f41dddbdc954401071dca4b640c65fe315552eee79575a494a4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x68C6 5256 bytes
font_01_sfnt_off00007a9a.bin
dd5e9663ed147b34dea3de778f5add8ce5339f3e0238546d2c09eca43c93015b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A9A 10524 bytes

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