Malicious PDF — malware analysis report

Static analysis result for SHA-256 19a413c6dfbdb02e…

MALICIOUS

PDF

42.5 KB Created: 2020-10-29 11:31:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 53db9582e224f09bf39c8327d3612e60 SHA-1: 92671c1f592b64150be4ce404dda1fff65fbc7be SHA-256: 19a413c6dfbdb02e281e3c47121d4b9c0edd4dcdc4c43a912e132d2129a666a9
154 Risk Score

Malware Insights

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

The PDF file contains embedded links that redirect to a known malicious domain, masquerading as a professional license search. The ML classifier strongly indicates maliciousness, and the presence of numerous external links suggests a link farm or SEO poisoning attempt to drive traffic to malicious infrastructure. No scripts were extracted, but the primary attack vector appears to be social engineering via a deceptive document.

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/strik?keyword=alaska+professional+license+search In PDF document text
    • https://cdn-cms.f-static.net/uploads/4379984/normal_5f90858cea701.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370294/normal_5f89754aab300.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/xefejevife/74989736326.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/277f2d08-631e-4ac2-9005-f11ef83e4cdd/94606917503.pdfIn PDF document text
    • https://s3.amazonaws.com/xanebavifamopez/rakidabefe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0268/8883/1165/files/hide_app_icons_android_5.pdfIn PDF document text
    • https://s3.amazonaws.com/juvetaso/jurnal_binahong.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0479/9954/9599/files/spider_man_java_apkpure.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/2951/0324/files/40562970018.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0480/1547/4847/files/xadelo.pdfIn PDF document text
    • https://s3.amazonaws.com/fasanag/vugil.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/4312/5917/files/jimoxerosodilavo.pdfIn PDF document text
    • https://s3.amazonaws.com/sorogamat/characteristics_of_natural_fibers.pdfIn PDF document text
    • https://s3.amazonaws.com/wipotegadodorek/tile_saw_harbor_freight.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/1353/7429/files/zikopesoboguzujekisepin.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/8344/1329/files/shyamchi_aai_english_book.pdfIn PDF document text
    • https://s3.amazonaws.com/fejatepudopito/45255536445.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_off00006688.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6688 5156 bytes
SHA-256: 84db85cf029c4565baa8b15596bb6a45c27c8889e5220172d8353912a525c3e1
font_01_sfnt_off00007810.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7810 10768 bytes
SHA-256: fd31226d92aa9d6aa73d2891678ba25b2a212ae143f4058177a07e57a4d76552

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