Malicious PDF — malware analysis report

Static analysis result for SHA-256 a2ee65421c57ac98…

MALICIOUS

PDF

57.9 KB Created: 2020-10-15 20:41:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: d5888b62cf6a3a948af75b0458d11cef SHA-1: 6c5ac767d974b47f0ef48c8d2df3037f2c87e177 SHA-256: a2ee65421c57ac98ec93816f936583b6c56a3782bdeb7fe1bef4e724ef2876d3
154 Risk Score

Malware Insights

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

The PDF contains a link farm with numerous embedded URLs, many of which point to benign Shopify files. However, one critical link redirects to `https://ggtraff.ru/strik?keyword=velveeta+cheese+block+instructions`, which is flagged as a known malicious redirector. The document body, though heavily obfuscated, contains this malicious URL, suggesting the primary intent is to redirect the user to a malicious site, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://ggtraff.ru/strik?keyword=velveeta+cheese+block+instructions In PDF document text
    • https://cdn-cms.f-static.net/uploads/4368493/normal_5f8819d660543.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367633/normal_5f876213ea485.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366327/normal_5f8716543e58e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367914/normal_5f88368f5091b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366388/normal_5f887d3b304ef.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366952/normal_5f872cf5754f7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370090/normal_5f8871e042eb9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367912/normal_5f87aa30c634c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365575/normal_5f8709212abe7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366357/normal_5f87ce19a7849.pdfIn PDF document text
    • https://site-1040099.mozfiles.com/files/1040099/5365625324.pdfIn PDF document text
    • https://site-1039533.mozfiles.com/files/1039533/tekasovibofo.pdfIn PDF document text
    • https://site-1037098.mozfiles.com/files/1037098/tafuzipideti.pdfIn PDF document text
    • https://site-1040681.mozfiles.com/files/1040681/fawojenisorifikekokon.pdfIn PDF document text
    • https://megadezatesaram.weebly.com/uploads/1/3/0/7/130776649/22ca507bf0.pdfIn PDF document text
    • https://dutitujazekap.weebly.com/uploads/1/3/0/8/130814390/7971455.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4538/8437/files/sunglass_holder_for_car_walmart.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/0240/3750/files/skyrim_treasure_maps_3.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2344/0804/files/metodusonuxerekojilo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5168/7848/files/81250674138.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/5131/8935/files/35140094465.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/3255/8791/files/7400_nand_gate_datasheet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0492/2785/8076/files/buzomatojodoli.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0478/7558/8262/files/scary_monsters_and_nice_sprites_midi_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0492/3854/0444/files/desejosi.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000080af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x80AF 5000 bytes
SHA-256: 7c51060ca1fa0117342818d1350b5ca6d4e7939db4c7e2c083e510e42d6feb4e
font_01_sfnt_off000091a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x91A0 10724 bytes
SHA-256: c5df898ee24b3adf383a7e7887bda8da9cd3c1eb1a8cba5a41c433c1bd73a563
font_02_sfnt_off0000b62e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB62E 16092 bytes
SHA-256: e9fe716c2abc985b12a899a49d5539e4e8be1b56d50c083b30290d85a2a7c848
font_03_sfnt_off0000caf6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCAF6 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333