Malicious PDF — malware analysis report

Static analysis result for SHA-256 2bd0ee0e23d3781e…

MALICIOUS

PDF

52.6 KB Created: 2020-08-12 13:54:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: deca8c3fc17e62e019b428340529d0f8 SHA-1: 32cde608f6d8b282c207218c5a193628980a49ec SHA-256: 2bd0ee0e23d3781ea33247575f36a73af15a2fdb322594a943534406dd8950b5
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a link farm designed to appear as legitimate documents, but the primary link redirects to a known malicious redirector. The ML classifier strongly indicates maliciousness. The document body, though heavily obfuscated, contains the malicious URL, suggesting a lure to a phishing or malware distribution site.

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.cc/pify?keyword=concept+of+time+value+of+money+in+financial+management+pdf
    • http://files.circleprincess.com/uploads/1/3/2/6/132681452/4356058.pdf
    • http://vijow.myhomeimprovementcareer.com/uploads/1/3/1/4/131409090/xubejilijuv.pdf
    • http://files.gudcompany.cl/uploads/1/3/2/6/132682119/baa8634a9d2695.pdf
    • https://cdn.shopify.com/s/files/1/0435/6440/0798/files/download_adobe_acrobat_reader_for_windows_10.pdf
    • https://cdn.shopify.com/s/files/1/0437/6517/0334/files/american_english_file_4_student_book_pdf_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0429/9869/4049/files/14471233091.pdf
    • https://cdn.shopify.com/s/files/1/0433/9505/5766/files/basis_of_apportionment_of_overheads.pdf
    • https://cdn.shopify.com/s/files/1/0436/4143/8366/files/magnificence_affirmation_cards.pdf
    • https://cdn.shopify.com/s/files/1/0443/6580/7772/files/python_language_in_urdu.pdf
    • https://cdn.shopify.com/s/files/1/0429/9735/0554/files/aula_internacional_1_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0428/7673/1558/files/lakogidaniditaz.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/11411440246.pdf
    • https://cdn.shopify.com/s/files/1/0449/4236/0744/files/fisiopatologia_doena_de_alzheimer.pdf
    • https://cdn.shopify.com/s/files/1/0428/3708/2271/files/3249983632.pdf
    • https://cdn.shopify.com/s/files/1/0432/3144/5156/files/zasutifibivawetu.pdf
    • https://cdn.shopify.com/s/files/1/0432/0821/2638/files/rowajeralisenez.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/

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000081d2.bin
653a97be5e29fdcf28940f9e33c638e2974db4df6160444e1b2605031d028119		 pdf-font-stream PDF embedded font (sfnt) at offset 0x81D2 5268 bytes
font_01_sfnt_off000093b6.bin
f2f80d11ef956606913c7676bda79810f984c8722d2519bd1030e2586d06ae11		 pdf-font-stream PDF embedded font (sfnt) at offset 0x93B6 10148 bytes
font_02_sfnt_off0000b684.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB684 4324 bytes

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