Malicious PDF — malware analysis report

Static analysis result for SHA-256 28ac949889eaf1f1…

MALICIOUS

PDF

46.9 KB Created: 2020-10-06 14:01:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: b43c071b3760366c7eff6e5acf9f4936 SHA-1: c8507beb45372f6495926b8ca43182c8d214dc42 SHA-256: 28ac949889eaf1f1b0428adfdab7f95213263a546a899dcc9924ed37bf2dc55c
154 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by a machine learning classifier and contains a link to known malicious redirector infrastructure. The document also functions as a link farm, pointing to numerous external PDF files, likely to manipulate search engine results or distribute further malicious content. The embedded URL 'https://cctraff.ru/pify?keyword=the+secret+life+of+bees+chapter+1+theme' is a primary indicator of malicious intent.

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://cctraff.ru/pify?keyword=the+secret+life+of+bees+chapter+1+theme In PDF document text
    • http://gejiwiniw.robynveal.com/uploads/1/3/1/6/131636879/beburarusavo-dosejolu-zixaf-kewej.pdfIn PDF document text
    • http://dikodi.colchestertri.com/uploads/1/3/2/7/132712207/35091b4135bc.pdfIn PDF document text
    • http://farawi.abbypotter.com/uploads/1/3/1/4/131453832/wepabewezonawizabezo.pdfIn PDF document text
    • http://sobew.journeyinfaith-stlukeslebanon.org/uploads/1/3/0/7/130775034/0335a4c477.pdfIn PDF document text
    • http://files.wittylittlemind.com/uploads/1/3/1/8/131860645/6062931.pdfIn PDF document text
    • https://site-1039508.mozfiles.com/files/1039508/fidefimadi.pdfIn PDF document text
    • https://site-1039305.mozfiles.com/files/1039305/67460554163.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/1/0485/1158/2370/files/91958579028.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3795/7023/files/how_to_remove_line_in_word_template.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5827/3183/files/85819295732.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/2297/4627/files/stanley_fatmax_stud_finder_400_instructions.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7369/0017/files/goxilodipudesiri.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/1147/3059/files/want_mature_dating_site_reviews.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2664/4119/files/62088746526.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_off00007806.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7806 5396 bytes
SHA-256: 23e663b862d3f0b3c77f62540045ed34a1921f597cd97d34effc19dd88e8d540
font_01_sfnt_off00008a3a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8A3A 10596 bytes
SHA-256: fdf5d8a1af2535d806e1f1eb6d222448362e60684277c5a4476411c019cdbadc

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