Malicious PDF — malware analysis report

Static analysis result for SHA-256 6bd3ba8392c22656…

MALICIOUS

PDF

39.4 KB Created: 2020-10-19 11:30:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 61af15823598699b6b283c09ee363987 SHA-1: 36b9dc5d7ff5a36252343bd6337816cdb450fd63 SHA-256: 6bd3ba8392c226567a5c8acd4c1264cf74d72dcc082f83734c1ffc45ed4caa40
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a critical heuristic firing for linking to known malicious redirector infrastructure, specifically the URL https://ttraff.com/123?keyword=volere+potere+dovere+esercizi+pdf. Additionally, it exhibits characteristics of a link farm, embedding numerous external PDF links, many of which point to Weebly hosted files. The ML classifier also strongly flagged this PDF as malicious. These factors indicate a deliberate attempt to direct 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.com/123?keyword=volere+potere+dovere+esercizi+pdf In PDF document text
    • https://saxibodusazo.weebly.com/uploads/1/3/0/7/130740440/xegejiv_noraru_zonovoduborebo.pdfIn PDF document text
    • https://vuxozajuje.weebly.com/uploads/1/3/1/3/131379873/kekikefuwu.pdfIn PDF document text
    • https://jabiratunibi.weebly.com/uploads/1/3/2/6/132683422/9f47ce0d414.pdfIn PDF document text
    • https://sabidodavo.weebly.com/uploads/1/3/1/4/131408103/4342710.pdfIn PDF document text
    • https://zoveponezewuda.weebly.com/uploads/1/3/0/7/130738822/1865165.pdfIn PDF document text
    • https://kurikezexiwu.weebly.com/uploads/1/3/0/7/130775092/vibekiv-dibetamebadekal-ruvil-viragus.pdfIn PDF document text
    • https://bubixoduxufito.weebly.com/uploads/1/3/1/0/131070588/fikid.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366375/normal_5f8762098de1c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365662/normal_5f874a7238c88.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375353/normal_5f8b7c4b3ca5d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/6879/6311/files/wufosag.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0493/9851/3831/files/fezatazafo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0319/9138/files/17636878571.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0485/7351/3888/files/provocative_readings_for_socratic_seminars.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0493/7534/6847/files/53551992560.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9020/7135/files/lizakoxenorozux.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5943/7975/files/3.3_fluid_oz_to_ml.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/6050/0901/files/chantix_continuing_pack_instructions.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/0398/8126/files/88725940083.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/6728/8989/files/my_friend_pedro_2000_kills.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2512/9891/files/the_3_chairs_bruce_wilkinson.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5727/4261/files/folavijuju.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0475/9398/0060/files/89089027916.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005a11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5A11 5012 bytes
SHA-256: 8071fd73c01d46075f89121909ba69ca6c2be6ae4ec26ee9381d4c5167531f4a
font_01_sfnt_off00006b48.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6B48 10720 bytes
SHA-256: f4cefedd9bb0ebb915a2ed125c06568385d2fa146b899b952bb265850e49678a

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