Malicious PDF — malware analysis report

Static analysis result for SHA-256 2cdac034120d739d…

MALICIOUS

PDF

40.6 KB Created: 2020-08-21 22:53:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 15701809dab0c11347397fa83b141463 SHA-1: 6b65f8c493b2af72ec16004398cdd2a3efe9d2df SHA-256: 2cdac034120d739d170b691246aa5295ea5066207cdd14c224d45aad88d64d56
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, suggesting an attempt to lead the user to malicious content or a phishing site. The document body, though heavily obfuscated, contains the same redirector URL and references to 'barcode scanner android java example', likely as a lure. The presence of numerous external PDF links, many pointing to benign Shopify URLs, suggests a link farm or SEO manipulation tactic to increase the visibility of the malicious redirector.

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.ru/pify?keyword=barcode+scanner+android+java+example In PDF document text
    • http://mamekosot.thevillestudio.com/uploads/1/3/0/8/130874655/279040a584a.pdfIn PDF document text
    • http://files.theseasonalcollection.com/uploads/1/3/0/9/130969663/butijurimawo.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/1/0434/0904/7708/files/neoplastik_adalah.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5900/4070/files/ubqari_magazine_january_2020_free_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7731/2411/files/xebaxizipeniniwa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/0655/6320/files/sap_abap_tutorial.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/1740/2530/files/bacteriologia_medica_ana_maria_castro.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2924/9694/files/nunabuwemisugagenase.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/5406/9925/files/aadhaar_data_update_form_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5249/8070/files/7326215406.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8518/5702/files/lopimozarawisaso.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7450/9213/files/26376678529.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4760/0796/files/19889401755.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7300/2906/files/kofivin.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_off00005edf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5EDF 5472 bytes
SHA-256: 403ceeac7930081b8f2d0a65f97c5aaab7724a6b27a00fa41de72356f3839e57
font_01_sfnt_off00007165.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7165 10552 bytes
SHA-256: 1b81d6cf2d4f1d3bf5517fb6d28b54a62baa24b80b9546a62fd022d429c67fa0

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