Malicious PDF — malware analysis report

Static analysis result for SHA-256 f718a383313ab6b0…

MALICIOUS

PDF

48.5 KB Created: 2020-11-01 23:14:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fde0713b5674afeb4e42ae235c480d77 SHA-1: 5b839fc225c64dd8292e0e3e87b0e8db8fe8e293 SHA-256: f718a383313ab6b0275b2eaac1116f9c62f7b57c652e5afe78341a3b12d39b31
94 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://ttraff.club/123?keyword=romesco+sauce+nut+free'. The ML classifier also strongly flagged this PDF as malicious. While no scripts were explicitly extracted, the presence of embedded URLs and the redirector link strongly suggest an attempt to lure the user to a malicious site, likely for phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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.club/123?keyword=romesco+sauce+nut+free
    • https://vibebivenef.weebly.com/uploads/1/3/1/4/131412032/2f8ca042a26b.pdf
    • https://nadazilagola.weebly.com/uploads/1/3/4/3/134314388/600329.pdf
    • https://cdn-cms.f-static.net/uploads/4369163/normal_5f88c0dbec948.pdf
    • https://cdn-cms.f-static.net/uploads/4373755/normal_5f89f64b0f959.pdf
    • https://cdn-cms.f-static.net/uploads/4371799/normal_5f8abaa885344.pdf
    • https://cdn-cms.f-static.net/uploads/4366367/normal_5f87182dd68a9.pdf
    • https://bedakowunuva.weebly.com/uploads/1/3/4/3/134342711/mejiridesog.pdf
    • https://cdn-cms.f-static.net/uploads/4380531/normal_5f9c56674a03c.pdf
    • https://cdn-cms.f-static.net/uploads/4382953/normal_5f914fe5c7447.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/643d403a-62bb-4b73-8c59-6c2389ec5449/76825034782.pdf
    • https://cdn.shopify.com/s/files/1/0434/4132/4184/files/58982350881.pdf
    • https://uploads.strikinglycdn.com/files/c652ea8a-e280-4f15-8d48-3629c7234865/zuvigenabugor.pdf
    • https://uploads.strikinglycdn.com/files/b494b831-082e-4257-8c67-8fbcb7d29964/44395118886.pdf
    • https://cdn.shopify.com/s/files/1/0485/9510/8000/files/csulb_library_research_databases.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006aa6.bin
8fad3e1b803773fefca05865c5c43bc32b16faf59ef6a2a67057aa8746fb2557
pdf-font-stream PDF embedded font (sfnt) at offset 0x6AA6 5004 bytes
font_01_sfnt_off00007b97.bin
55fce54689fff334e1723879de674658d38bfbc6a0b6cbd98bd7e7139445415b
pdf-font-stream PDF embedded font (sfnt) at offset 0x7B97 10620 bytes
font_02_sfnt_off0000a019.bin
ea75db71c9df7250347a03039f742fcd189f5fc3f08964e696816fa8b5227073
pdf-font-stream PDF embedded font (sfnt) at offset 0xA019 16092 bytes