Malicious PDF — malware analysis report

Static analysis result for SHA-256 68752f4f775ff3d1…

MALICIOUS

PDF

83.1 KB Created: 2020-12-14 23:01:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: a592e3bf9362d889830c0841fb671fb3 SHA-1: 832667e2b9f053e8479e0317567315cca2e70e71 SHA-256: 68752f4f775ff3d1b390442c73c22ec0dff2fd405ece08434ea5ddb050b46b6c
214 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by multiple heuristics, including a critical finding for redirector links and a machine learning model. It contains a large number of embedded links, with one pointing to a known malicious redirector infrastructure at 'ggtraff.ru'. The document body is heavily obfuscated, but the presence of numerous links suggests an attempt to lure users to external, potentially malicious, sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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/aws?utm_term=i%2527+m+alive+sia+song In PDF document text
    • https://galixasuja.weebly.com/uploads/1/3/4/5/134518214/9851024.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://s3.amazonaws.com/gidibesuxi/17863354889.pdfIn PDF document text
    • https://s3.amazonaws.com/lezopobigeza/pepsina_funcion.pdfIn PDF document text
    • https://s3.amazonaws.com/varolexexus/captain_beatty_song.pdfIn PDF document text
    • https://s3.amazonaws.com/vedexajawo/titavotawar.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7e1ad783-6068-4d73-97f2-08f77822e4df/43149490984.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cc8cdf6c-0bf1-4409-9c92-93325935acac/ffxiv_arr_blacksmith_desynth_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/fejatepudopito/translation_lithuanian_to_english_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/61221a65-3376-4073-a680-785a4ac773c2/zumokoximoraverikape.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fdf147eb-2317-485b-bb1f-e481734e0544/poplar_bluff_mexican_restaurants.pdfIn PDF document text
    • https://s3.amazonaws.com/gupuso/8674900990.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f5a8b99e-107f-43eb-af80-c02b9d2b9de1/najofexuselipedoviforopav.pdfIn PDF document text
    • https://s3.amazonaws.com/wisuw/guided_tapping_for_anxiety.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/43b7d7f4-7b1e-42b8-8ad8-2d4a7edd86c9/clash_of_clans_update_apk_2019.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6d0d3736-a02e-4f12-871b-3783d0029eff/lamenorowovepapizaw.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d79c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD79C 9428 bytes
SHA-256: c472f3c94198a94a408f0a6b56bb8cbaf787e59a8a2bb6b9f6ba840791690b4b
font_01_sfnt_off0000f70e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF70E 4648 bytes
SHA-256: 77ed672edeafa338ba913654ec9e7f60a6daf294c62bce715225b4c4f71ce105
font_02_sfnt_off000106bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106BC 13456 bytes
SHA-256: 199051d80e72e6d7e3092a0eddb80711f9a332bf7891086a9cc149abf107685d
font_03_sfnt_off000130bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x130BB 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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