Malicious PDF — malware analysis report

Static analysis result for SHA-256 f77e12983a850094…

MALICIOUS

PDF

51.8 KB Created: 2020-11-06 02:19:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 6ab2ac2748c0d5b52f224273ac617ecb SHA-1: 3c86726e772cfcf8250b902a9b1c3dcddb83de13 SHA-256: f77e12983a850094631d6dee9fb045ee142a602e56c38b2d262413f8c8745db1
132 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains multiple embedded URLs and a visual download button, indicating a lure to trick users into clicking malicious links. One of the primary links, 'https://traffmen.ru/strik?keyword=nikon+f3+manual+download', is flagged as a known malicious redirector. The document body, though heavily obfuscated, contains this URL, suggesting it's the intended destination. The ML classifier also strongly flagged this PDF as malicious.

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 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.
  • 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://traffmen.ru/strik?keyword=nikon+f3+manual+download In PDF document text
    • https://mefemanodi.weebly.com/uploads/1/3/1/4/131454269/kezonezabam.pdfIn PDF document text
    • https://menerixejujup.weebly.com/uploads/1/3/4/6/134605313/c5f82b1c33.pdfIn PDF document text
    • https://bilewobadazape.weebly.com/uploads/1/3/2/6/132695578/2682796.pdfIn PDF document text
    • https://lefedatit.weebly.com/uploads/1/3/0/7/130776734/devufurakexibakefis.pdfIn PDF document text
    • https://mekuxiwefajup.weebly.com/uploads/1/3/0/7/130739023/fimoretera.pdfIn PDF document text
    • https://dejolezeg.weebly.com/uploads/1/3/2/8/132815968/tomaxov-rukatijuto-vekale.pdfIn PDF document text
    • https://worozimovazez.weebly.com/uploads/1/3/1/4/131406108/9415022.pdfIn PDF document text
    • https://sumadapovememer.weebly.com/uploads/1/3/4/4/134494733/9912124.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://uploads.strikinglycdn.com/files/2e34f3b3-58ef-49bb-9795-f4dade6cd147/clinical_scenarios_in_surgery.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7f03a605-cc37-4861-9292-b119d3e3d18f/kabipodajis.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8276/7779/files/jabisorebiburimugura.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2f7ac614-9b1d-4a86-95cd-f3664c121582/my_bloody_life_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fd4f397d-bebe-4384-8df9-e8bf366235b4/bevogajotufamutotewineb.pdfIn PDF document text
    • https://s3.amazonaws.com/sivanira/raging_planet_lightning_worksheet_answer_key.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aa6b78db-b191-4dd7-8bc9-cbdbfbf9cee9/41096637847.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_off00007ebb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7EBB 4752 bytes
SHA-256: 1ac486f616aed61df442ab7e5257ce3c014386406009c4918e5da0568713f2e4
font_01_sfnt_off00008ed6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8ED6 10912 bytes
SHA-256: efd88c6dd372eaf72b311129d2a403877263debad600c912d614fa643d6dc843
font_02_sfnt_off0000b414.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB414 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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