Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a70780665d4c7f5…

MALICIOUS

PDF

62.0 KB Created: 2020-10-10 11:56:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 1b94528ab26abe9305b905686ddc145f SHA-1: 79252b53a63ba11e121993e3e7d5b10d5eca0014 SHA-256: 0a70780665d4c7f5fac653952575c7754f243f6692d1f6bcf4d51a171b454a07
162 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one specifically identified as a malicious redirector. The document body, though heavily obfuscated, contains a URL that matches the malicious redirector found by heuristics. This suggests the PDF is designed to trick users into visiting malicious websites, likely for further exploitation or credential harvesting.

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.
  • 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://gettraff.ru/strik?keyword=bernina+1090+manual+free In PDF document text
    • http://files.seanbjerke.net/uploads/1/3/2/8/132814071/vajezavatowuf.pdfIn PDF document text
    • http://files.claudebehrmannarchitect.com/uploads/1/3/1/3/131378921/misuzaximekesaxubomo.pdfIn PDF document text
    • http://dimolul.tolumorawo.com/uploads/1/3/1/8/131856316/6544171.pdfIn PDF document text
    • http://dixiz.duniaamir.com/uploads/1/3/1/4/131438019/kavibilazefi.pdfIn PDF document text
    • http://jotabimi.karriinwonderland.com/uploads/1/3/0/8/130873848/887b20c76be0c7c.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://cdn.shopify.com/s/files/1/0434/0118/3397/files/52159650032.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0487/8709/5717/files/how_old_is_wiz_khalifa_daughter.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0493/1744/5793/files/91211866322.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/0741/7757/files/58151341010.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0478/9783/7734/files/lifibasipusiwadexawop.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/9928/2336/files/full_tang_swords_battle_ready.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/6490/0763/files/61686566032.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/02ad6776-2eaa-4046-8763-eac86ff336e1/forakitaxosa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/01e781b4-5f99-4598-bef0-b559949f975f/94705006516.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_off0000a778.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA778 4824 bytes
SHA-256: f96516f07e76a765314e1d241ce5f6ed7d3e8fcc9a2eedf8a21b9d11e82c6828
font_01_sfnt_off0000b7b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB7B7 10796 bytes
SHA-256: df34f2d9058ee77fe061455a1150e757c0fd0684484a989bf18d21dda2933f28
font_02_sfnt_off0000dca7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCA7 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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