Malicious PDF — malware analysis report

Static analysis result for SHA-256 61ba3fcc1fb48cfa…

MALICIOUS

PDF

38.7 KB Created: 2020-08-07 09:57:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 280e9cb0ab9a44ca32ea256c1414a837 SHA-1: 3007d5ca8d4c617de0ae7a3a12eec1660cad893f SHA-256: 61ba3fcc1fb48cfa9780369f96be244512b77fdf9b1ab2f9fa2d839eb1a9fb6e
154 Risk Score

Malware Insights

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

The PDF contains a link farm and a redirector to malicious infrastructure, disguised as a badminton score sheet. The ML classifier strongly indicated maliciousness. The embedded URLs suggest an attempt to distribute further malicious content or phish users by linking to numerous other documents, likely for SEO poisoning or to appear legitimate.

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 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.
  • 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://ttraff.ru/pify?keyword=badminton+score+sheet+doubles+pdf
    • http://files.grayinsuranceagency.com/uploads/1/3/1/4/131407061/kitif.pdf
    • http://files.hanovergrovehoa.com/uploads/1/3/0/9/130969826/liwidojibu.pdf
    • http://files.compassionate-language.com/uploads/1/3/1/4/131437513/5457804.pdf
    • http://files.egnicksdtp.com/uploads/1/3/0/9/130969735/pusaruwevagubor.pdf
    • http://files.windhoekradioflyers.com/uploads/1/3/0/9/130969470/gisivetulo.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0435/4742/6965/files/67903314797.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/48466687054.pdf
    • https://cdn.shopify.com/s/files/1/0440/6634/1029/files/international_phonetic_alphabet_book.pdf
    • https://cdn.shopify.com/s/files/1/0434/5744/6038/files/adverbial_clauses_of_reason_exercises.pdf
    • https://cdn.shopify.com/s/files/1/0437/6117/2631/files/posafazoxobexovaromepusu.pdf
    • https://cdn.shopify.com/s/files/1/0429/9443/4207/files/adding_and_subtracting_fractions_worksheet_7th_grade.pdf
    • https://cdn.shopify.com/s/files/1/0428/7656/7711/files/gipenanejasefakalenoroti.pdf
    • https://cdn.shopify.com/s/files/1/0440/9756/8920/files/40769709937.pdf
    • https://cdn.shopify.com/s/files/1/0435/3631/8616/files/xabome.pdf
    • https://cdn.shopify.com/s/files/1/0427/7973/8278/files/git_ignore_not_working.pdf
    • https://cdn.shopify.com/s/files/1/0435/5109/6984/files/93806507146.pdf
    • https://cdn.shopify.com/s/files/1/0431/5889/6802/files/46465925939.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005a4a.bin
3ff64229265c5c60549a1e4df6b85b89710c53ae3bcae83e4f5d8a8b60838ac2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5A4A 5584 bytes
font_01_sfnt_off00006d1a.bin
ae426d3403b6e05014f25318efc42afa16660bdd77fbded13ad29c3ead96f417		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D1A 9640 bytes

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