Malicious PDF — malware analysis report

Static analysis result for SHA-256 48356dae39823b20…

MALICIOUS

PDF

114.7 KB Created: 2020-10-15 06:34:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 2308c177b356836370133b4db1fe2d3e SHA-1: 6fa232c10de64de987f21808b9c8f4137d91d551 SHA-256: 48356dae39823b201de112582924b2b37e30fdb8a7166f0c90015ae9f31ac755
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one critical heuristic identifying a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains a URL that appears to be the primary lure. The ML classifier also strongly indicated maliciousness. No scripts were extracted, but the presence of malicious links suggests an attempt to redirect users to a harmful site.

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.club/pify?keyword=alter+ego+a1+guide+pedagogique+pdf In PDF document text
    • https://site-1043606.mozfiles.com/files/1043606/dejazun.pdfIn PDF document text
    • https://site-1043666.mozfiles.com/files/1043666/teweromukisub.pdfIn PDF document text
    • https://site-1039472.mozfiles.com/files/1039472/35026189867.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366313/normal_5f8728e085a33.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368501/normal_5f87b0d088b26.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368230/normal_5f87a3bd24462.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365599/normal_5f8770d8dead3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366020/normal_5f87566ce0850.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366964/normal_5f8785399be1f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366662/normal_5f8736c98c65f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366665/normal_5f8767d50e8ad.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366952/normal_5f872a35cc5a5.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/1/0435/3127/2351/files/18279913004.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/5254/5701/files/the_paleo_manifesto_free_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/1735/3400/files/historia_de_la_celula_procariota.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9603/8812/files/return_man_8_espn.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0479/7028/7772/files/finomikofadoleb.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/8600/3354/files/20621881014.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8191/5802/files/growing_donut_peaches_from_seed.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/9716/0866/files/que_leon_movie_ozuna.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5573/5193/files/75382921725.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/3769/5393/files/15632409734.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001700a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1700A 5196 bytes
SHA-256: ccf69cf1bdb8d3f52b15b7cfd6880619c5b11417ca5bfdde93e519a4a6bf7f1a
font_01_sfnt_off000181c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x181C3 10848 bytes
SHA-256: ffc53a447991e95b98e15086967e6af62071eadc7ea8077df446519c603a409c
font_02_sfnt_off0001a6c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A6C7 16284 bytes
SHA-256: d1e1397821fd964505e690a59dd3feb32aadebe8610bfd99f1f40316611a9303

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