Malicious PDF — malware analysis report

Static analysis result for SHA-256 8b7e947ba1ab30b8…

MALICIOUS

PDF

52.9 KB Created: 2020-11-08 20:46:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: b024308b144b0fad4b8bf4eef920622c SHA-1: 1ef1e5d031e7cab03c8b2dcbd41fa294749fea06 SHA-256: 8b7e947ba1ab30b81383691f2dc316d97ef8a8cc7fa03903a85b4600047edcff
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1105 Ingress Tool Transfer

The PDF contains a large number of external links, as indicated by the PDF_SEO_LINK_FARM heuristic, suggesting a link farm or redirection scheme. The primary URL, 'https://traffnew.ru/123?keyword=college+pressures+by+william+zinsser+pdf', appears to be a lure. While no scripts were extracted, the ML classifier and the sheer volume of external links strongly suggest malicious intent, likely to drive traffic or distribute further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://traffnew.ru/123?keyword=college+pressures+by+william+zinsser+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4370302/normal_5fa306672fe9e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365540/normal_5f8ce737d170e.pdfIn PDF document text
    • https://tibiwurab.weebly.com/uploads/1/3/2/6/132695994/sibuvodoz-zazekojozawisi-nodowana-joxabe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417525/normal_5f9c0980ca145.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375352/normal_5f89e0764fa3b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383475/normal_5fa330604bd73.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/donarepemi/loolbox_arabic_iptv_apk_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ad6dad4e-8c43-45aa-acce-8e0e66e676e3/zisadelulojov.pdfIn PDF document text
    • https://s3.amazonaws.com/vonusirukete/arvada_west_hs_baseball.pdfIn PDF document text
    • https://s3.amazonaws.com/zifozujiwi/rexovuwenofeg.pdfIn PDF document text
    • https://s3.amazonaws.com/lewuli/usa_test_prep_algebra_1_answers.pdfIn PDF document text
    • https://zirevafove.files.wordpress.com/2020/11/lavutobezegadoxevutoxonar.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2e3678f6-e4d6-49f2-9315-64413c7cfdc4/66698999099.pdfIn PDF document text
    • https://s3.amazonaws.com/memul/15411401385.pdfIn PDF document text
    • https://s3.amazonaws.com/votubukaxogilix/icd_10_code_nsclc_stage_4.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008f94.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8F94 5652 bytes
SHA-256: 46b42237a1cbdc530119dace428d3365904acbd5d2f94af547013c8e24d87469
font_01_sfnt_off0000a2cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA2CF 10516 bytes
SHA-256: e1df1ea876937d3ebe1a0e671077b557538f610f0f4be2fcf78131b9a9204930

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