Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ab4b1bcfeaf7f69…

MALICIOUS

PDF

38.9 KB Created: 2020-10-08 00:31:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: def745377744b2f04e5903e3b4ce4e72 SHA-1: 504fd4825da4cd1d7368feac497e02e7ada3d720 SHA-256: 2ab4b1bcfeaf7f69424cb88824223274507c6ee85044443abc897f97e0386d10
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to external PDF files, a technique often used for SEO poisoning or to host phishing content. One prominent link directs to a known malicious redirector. While no scripts were directly extracted, the PDF structure and embedded links suggest an attempt to redirect users to malicious sites, potentially for credential harvesting or malware distribution.

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/pify?keyword=chamblee+high+school+volleyball In PDF document text
    • http://files.misswolfeskindersrock.com/uploads/1/3/1/0/131070313/jojenisoforuf.pdfIn PDF document text
    • http://files.pendapat-malaysia.org/uploads/1/3/1/8/131856827/1294950.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/1/0439/1898/3323/files/chungnam_national_university_scholarship.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0470/8715/7406/files/18373788078.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/7204/2661/files/janes_aircraft_recognition_guide_free_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/2278/1080/files/fabubefulagusu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3250/1656/files/chapter_6_medieval_europe_study_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f7a94756-0800-4608-8c71-e3eaa1343d1a/puxetiladizodagizarex.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/248ca410-eb2a-4ff3-bbfb-0930c46f2ee8/59210977532.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/0347/2795/files/sony_str-dh800_service_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0901/4940/files/66089220771.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0479/2716/5092/files/pozoripovisexu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8767/5036/files/25888056351.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5235/2159/files/38308317293.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_off00005b41.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5B41 5324 bytes
SHA-256: bebee55cf85b2e55941508d618187a34cd99fee0a670ccaad74f1a754aa09471
font_01_sfnt_off00006d44.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6D44 9932 bytes
SHA-256: 00210a46771f63a7b20377ed10a8953ad775955639350dbd5309355ae1aba83a

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