Malicious PDF — malware analysis report

Static analysis result for SHA-256 ceaaf1a370878f20…

MALICIOUS

PDF

48.0 KB Created: 2020-10-18 05:13:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: ea64f0ca0df48ffec8b43fc056ac2f5e SHA-1: 71d4ffa0f2c72aeb106720f4a85294b304e42792 SHA-256: ceaaf1a370878f207d62efa06498a71600f9f404ccdb277f2650d0d5edcc38a2
162 Risk Score

Malware Insights

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

The PDF contains a critical heuristic indicating it links to known malicious redirector infrastructure, specifically 'ggtraff.ru'. It also exhibits characteristics of a PDF SEO link farm, with numerous links pointing to external PDFs, many hosted on Shopify. The document body, though heavily obfuscated, contains references to 'Google play games android apk download' and the malicious URL, suggesting a lure for users seeking software. No scripts were extracted, but the presence of malicious links and the SEO link farm pattern strongly suggest an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/123?keyword=google+play+games+android+apk+download In PDF document text
    • https://cdn-cms.f-static.net/uploads/4374984/normal_5f8b844d3a7a9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365586/normal_5f8ba125af85b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365612/normal_5f87d93f2b4b8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367648/normal_5f8879c7e2b5d.pdfIn PDF document text
    • https://fijojonibiw.weebly.com/uploads/1/3/2/6/132681787/bupemigimamuvap.pdfIn PDF document text
    • https://sovopubi.weebly.com/uploads/1/3/0/7/130775052/rerip_pegijakex_tajojij_farivorepaki.pdfIn PDF document text
    • https://pojutawetuje.weebly.com/uploads/1/3/1/3/131382470/loduvoxivodexer_pojipoxuje.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372987/normal_5f89317bbe013.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370319/normal_5f8b8305a5896.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375705/normal_5f899e426cb03.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/1/0431/3071/6314/files/inoty_apk_download_apkpure.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/5404/6618/files/bugudabufojidoreduzax.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/7820/4574/files/texas_instrument_ti-30x_iis_exponents.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6441/7694/files/ark_creative_mode_command.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/6093/1991/files/spaceflight_simulator_mod_apk_latest.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/0266/1536/files/tafogezebudakazubemub.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9007/6067/files/wow_fishing_guide_bfa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0478/4881/6799/files/fiduveto.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/8602/8193/files/nakagug.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/9341/3025/files/properties_of_parallelogram_rectangle_rhombus_square_worksheet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0479/2116/8540/files/activity_1-5_temperature_and_its_measurement_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0604/2023/files/ecm_to_bin_converter.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006dc8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6DC8 5276 bytes
SHA-256: 725f4802d54e5205038d6b50a92da78e58cd09955bb53f0206b4bf052f7a19cf
font_01_sfnt_off00007fab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7FAB 10872 bytes
SHA-256: 4aaf9cbacfe264de1a79e817da6d80a412c721e6f754023b7c084e278fce8902
font_02_sfnt_off0000a40c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA40C 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34