Malicious PDF — malware analysis report

Static analysis result for SHA-256 35ab523844b66cd6…

MALICIOUS

PDF

44.1 KB Created: 2020-10-31 00:39:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0e0c7fa22cb4b00f2667bd1792f6034b SHA-1: 547b231621c0960f7e9b688318e2cc604848f1d3 SHA-256: 35ab523844b66cd695a1554207128302dc9a298d0ffade84098107591c080148
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of embedded links, with one identified as a known malicious redirector. The ML classifier also flagged the document as malicious. The embedded links suggest an attempt to direct users to malicious sites, potentially for phishing or to host further malware. No scripts were extracted, and the document body was heavily obfuscated.

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.link/123?keyword=development+of+chick+pdf
    • https://wejuvizir.weebly.com/uploads/1/3/4/3/134395749/55df023.pdf
    • https://cdn-cms.f-static.net/uploads/4393647/normal_5f98504feb4bb.pdf
    • https://femodufawo.weebly.com/uploads/1/3/4/3/134317846/645883.pdf
    • https://berotejenikakoz.weebly.com/uploads/1/3/0/7/130775756/36da25.pdf
    • https://rakamukomegu.weebly.com/uploads/1/3/2/6/132681656/wuferotuliguxag.pdf
    • https://cdn-cms.f-static.net/uploads/4365582/normal_5f86fa09e0384.pdf
    • https://givifajilodox.weebly.com/uploads/1/3/0/8/130874655/vaputejagima_niratesav.pdf
    • https://bizowubojixix.weebly.com/uploads/1/3/4/2/134265373/vesixoj-rivulukebebu-toxowexu-dutobukevigiz.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/c295d7e6-0339-411b-bfa9-7fbe7ba1e846/37978098896.pdf
    • https://uploads.strikinglycdn.com/files/2cb000dc-33fa-4e83-b887-f594957f3b44/29191807453.pdf
    • https://uploads.strikinglycdn.com/files/73db6556-066a-4f6c-b5d1-cd67235072f6/jawewisewuvurofikezi.pdf
    • https://uploads.strikinglycdn.com/files/0a26a3c4-1299-4f08-bce1-31f2bd83a55b/mimapepakidudunasag.pdf
    • https://uploads.strikinglycdn.com/files/00684bd8-87b4-469e-91f5-4f7ace1233f8/zesor.pdf
    • https://uploads.strikinglycdn.com/files/4baf5489-d620-48e7-9067-eb92a49c8e64/20507595532.pdf
    • https://uploads.strikinglycdn.com/files/65931809-dda8-413d-bb57-5c3dbffcf235/jusejivakisubi.pdf
    • https://uploads.strikinglycdn.com/files/37d467d5-bf3e-48db-9c1e-ef8c8a3d31ac/intermediate_microeconomics_with_calculus_varian.pdf
    • https://uploads.strikinglycdn.com/files/c4a98ce9-8071-48d6-b674-eb0dfe80e77e/busevuw.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007006.bin
84513bd2d66fc7fee3de7c7d6c0798cb0aa3e3b7673eb1e3acb6deb65653682b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7006 5032 bytes
font_01_sfnt_off00008113.bin
388f603bb3aac3c156f173edbe46e905d3f9881274f50a9acd20a00294faa634		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8113 9964 bytes

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