Malicious PDF — malware analysis report

Static analysis result for SHA-256 58ffd73d3d7db478…

MALICIOUS

PDF

43.2 KB Created: 2020-10-17 09:46:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 91726664067cc1a859389a92834d4c35 SHA-1: f13a830021499c986fb126c604c180c7a8669e7c SHA-256: 58ffd73d3d7db478d507ce71536960a331241a6e742d220bd820522747bd4cb5
154 Risk Score

Malware Insights

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

The PDF contains embedded links that point to a known malicious redirector infrastructure. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' and the presence of numerous external PDF links suggest an attempt to lure users to malicious content. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a phishing or malware distribution attempt.

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://gettraff.ru/123?keyword=groupe+nominal+sujet+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366005/normal_5f8752beec739.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370561/normal_5f89143486206.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367621/normal_5f8a32ad7e11a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367646/normal_5f8802695828e.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/1/0482/0887/1581/files/56447539282.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/6074/3329/files/fikozinoweruwebiv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0485/0473/3857/files/45984254565.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/0659/3696/files/valewimekulare.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0475/3919/1974/files/centre_learning_community_charter_school.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0494/0677/1356/files/88822394904.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/6887/7721/files/fast_forward_tube_apk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0634/4868/files/iphone_not_receiving_calls_from_one_person.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0493/3068/4063/files/ketibu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/6050/1921/files/slow_shopping_thrapie.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0480/7308/0996/files/the_cay_chapter_summaries.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/70a447a6-38b9-4433-a358-4a4d35fdccc8/63656778466.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a86867d1-1525-41e8-a1cd-c3cb13d80773/36829440006.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6199/1841/files/72071534787.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/6719/7590/files/paneg.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_off00006534.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6534 5292 bytes
SHA-256: 15184ce1f43c25d1f50716945dc67a4da50b60b424facb7726fc875b01b0056f
font_01_sfnt_off00007722.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7722 12468 bytes
SHA-256: 2fa770340f1f30da70490924638891147eb1e76c4def9932e0e4ff7f349322b9

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