Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec040ccfd3cc5540…

MALICIOUS

PDF

40.7 KB Created: 2020-10-26 02:43:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: b3ddd98d208e3c60e1de8c2427d5102b SHA-1: 52b1895c69de71ecdb44756be1235fb6c554b4ee SHA-256: ec040ccfd3cc5540adfbab26ba62f5e03b66117fc33027437ac5f8b40fa8f6ee
154 Risk Score

Malware Insights

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

The PDF document contains embedded links, with one prominently featuring a search query for a 'vw golf 2019 owners manual' and directing to a known malicious redirector. The ML classifier strongly flagged this PDF as malicious, and heuristic analysis identified it as a redirector link and part of a link farm. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to redirect the user to malicious infrastructure, likely for phishing or further payload delivery.

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://ggtraff.ru/wb?keyword=vw%20golf%202019%20owners%20manual In PDF document text
    • https://cdn-cms.f-static.net/uploads/4376372/normal_5f923ef78ef61.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370073/normal_5f922d9fc4de1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365635/normal_5f8f27a36a552.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365546/normal_5f8c216a6a701.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383918/normal_5f8c02a3a2eca.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/b2bce148-f28e-4b2f-b4e0-41c0f1c819df/31118475530.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/325a0411-3ec1-4054-9f06-d7dcff1a5d8b/64167999801.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aa7748f8-b251-405f-8ef0-022b60c06af6/49100144841.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/2484/2391/files/jesed.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/3930/7949/files/97266836435.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1b4b1758-bf2c-4a57-ba55-cdf3c1b11eaf/56388590056.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/42edad72-6a8d-480d-9217-f1848f3b8a37/kuxumobokitowodisuga.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a9232b15-4803-48e3-9673-648b78d6b05c/lodapekenex.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/19965073-f520-48db-bb3e-d5e952e43d2a/tutetajodomirel.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/94cca89b-3c49-4832-af80-716993c6f17b/black_desert_pure_powder_reagent.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0268/8037/7011/files/mr_krabs_face_shirt.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0479/2254/4807/files/hobbyking_esc_20a_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/1657/1040/files/fukogidi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/2435/3960/files/toshiba_ct_90366_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/8361/9232/files/kogaziwupojafemejaboveri.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3314/0127/files/12503079830.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/1173/4174/files/todo_pasa_por_algo.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_off00005eaa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5EAA 5628 bytes
SHA-256: efe21d23bf1491f64e29d91638ea946b38b974c32370ed64e4d1ccddf651d091
font_01_sfnt_off000071ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x71CE 10348 bytes
SHA-256: 23811a2e9bed169303b0dcd6b28ceb07d3cf0dd01b9dc8676761bcc8daf8ac00

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