Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a3643baa783a35f…

MALICIOUS

PDF

50.0 KB Created: 2020-10-29 03:24:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 1e0bbc6a2216de74d39b2def2b2828c9 SHA-1: 3e30967f09eea257cc33a2cdb978c59f01f1ee2f SHA-256: 0a3643baa783a35f2dfd9178f755a15d40f547c54e96b2e48e88a75123af0364
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many of which point to potentially malicious redirectors or SEO link farms. The document body, though obfuscated, contains the URL 'https://gettraff.ru/strik?keyword=otherworldly+patrons+5e+list', which is flagged as a malicious redirector. This suggests the document is designed to drive traffic to malicious sites, likely for phishing or malware distribution.

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.
  • LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND
    Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
  • 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/strik?keyword=otherworldly+patrons+5e+list In PDF document text
    • https://deriwofapavuz.weebly.com/uploads/1/3/4/3/134311795/xotali-zetafirofar-sajufepipa.pdfIn PDF document text
    • https://tavumake.weebly.com/uploads/1/3/2/7/132740551/jixoxararena.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370542/normal_5f9a08f5d1fe8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405459/normal_5f98410f60a4a.pdfIn PDF document text
    • https://jodotabamusunew.weebly.com/uploads/1/3/4/4/134402052/seveb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367305/normal_5f87380edb0f3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373248/normal_5f8e15dd1e765.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366033/normal_5f9657cbd219a.pdfIn PDF document text
    • https://fekebejoluxoji.weebly.com/uploads/1/3/4/3/134309121/wezutadivupazikamuve.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393364/normal_5f9284501b160.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375708/normal_5f8e8b7c4b0da.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402724/normal_5f91460a1a9c0.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/4515/3685/files/another_word_for_confused_person.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/8301/5366/files/download_game_lego_batman_apkpure.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/8617/1297/files/dazidinagewoberalagej.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/27efeccb-f4c0-401a-bc81-cceadc8d12c4/sonalulasuxumetux.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/4416/6049/files/dedabekefe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ded1ea6b-3349-4ca6-890c-4bbc630f57b8/82090745011.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0480/8645/0328/files/north_south_foundation_math_bee.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5cd9e58e-cffe-4207-85ae-3e1b731f26f5/muxolagum.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2870/0571/files/duxeberi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/5679/8117/files/learn_powershell_in_a_month_of_lunches_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0467/8038/3385/files/62390131343.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b7659fe8-66b6-4b8e-a5f3-1a7551d5f3ff/fakeritedorobonamegalen.pdfIn macro / runtime command snippet
    • 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_off000083f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x83F7 5392 bytes
SHA-256: f3296287f4cb9e99f9e89997014334d17ebf072387de487cdb71eb9aa4da4e72
font_01_sfnt_off00009654.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9654 10548 bytes
SHA-256: 456d2a6ef1bba0ec8a6bc8868d4493c986bbefa78552445cd2424770948ee674