Malicious PDF — malware analysis report

Static analysis result for SHA-256 afa8805ab67c2f7b…

MALICIOUS

PDF

42.7 KB Created: 2020-10-12 01:16:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 408d1622ebd09f31188af20f38224000 SHA-1: f1e3f44dc2a02e1addec2dbe87adbda477efab60 SHA-256: afa8805ab67c2f7bc2ec042494b5f45b81531b725c6d4d7f0d349eeb044d3889
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file contains embedded links that point to known malicious redirector infrastructure, specifically 'https://gettraff.ru/pify?keyword=hostel+4+2019'. The ML classifier also strongly indicated maliciousness. The document's purpose appears to be to lure users into clicking these links, likely leading to further malicious content or exploits.

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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://gettraff.ru/pify?keyword=hostel+4+2019 In PDF document text
    • https://site-1038608.mozfiles.com/files/1038608/bavubutubifowovexutovexi.pdfIn PDF document text
    • https://site-1044294.mozfiles.com/files/1044294/48804943789.pdfIn PDF document text
    • https://site-1036987.mozfiles.com/files/1036987/27736060179.pdfIn PDF document text
    • https://site-1038548.mozfiles.com/files/1038548/jadugodawubu.pdfIn PDF document text
    • http://files.activewavesolutions.com/uploads/1/3/2/7/132741181/rigena.pdfIn PDF document text
    • http://gukof.dannyderrick.com/uploads/1/3/1/3/131380005/f0c3e2719dc7a.pdfIn PDF document text
    • http://files.cupe2026.ca/uploads/1/3/0/8/130873810/1b02de2da7a40c4.pdfIn PDF document text
    • http://files.silvervalleyfarmsgooseeggs.com/uploads/1/3/1/4/131407465/08d8bc5ab7d.pdfIn PDF document text
    • http://tovofiw.m.torontoflowergallery.com/uploads/1/3/1/4/131453645/ditojevigiwepoko.pdfIn PDF document text
    • http://files.grignonmansion.org/uploads/1/3/1/8/131856068/nuwewuvugi_sosif_xafitedejupufe_dufululuzofo.pdfIn PDF document text
    • http://files.woodbridgecommunitychoir.org/uploads/1/3/1/6/131636808/mizodu-dasigebade-sasaxosa.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/c64f900d-eabe-46f5-b993-c3f074d5f27b/vexuvupiforapudu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6fb255e3-4c53-4477-84ea-3f23cfedbb6e/67860674849.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4f05e433-dd64-4873-abab-8b542607cdb5/magipujobibama.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e561b330-5dc0-4a29-a758-d155cd4a4f6f/tibebowejinigabuge.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4cd46e4f-5cc5-4aaf-879f-29583ced684c/koletedonolilawalagorim.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off00008424.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x8424 17508 bytes
SHA-256: 234a5ebeb9d827205cc11f826149dafc55a24ec808da1842d7d47fab78ac1c64
font_00_sfnt_off00004d7e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4D7E 4904 bytes
SHA-256: be79c99285ef02e5749e3e4982449af7229b413553f91dccbc47d99dcd5c4f4f
font_01_sfnt_off00005e46.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E46 14196 bytes
SHA-256: 0ccc2ccaf6d516f25ba7fbf3fb00e13a9fe159d88787ebbd70ee16067734e0cc

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