Malicious PDF — malware analysis report

Static analysis result for SHA-256 46387a49997ae321…

MALICIOUS

PDF

38.6 KB Created: 2020-08-26 09:59:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f432abdf87b5c39e3887ea56946472d8 SHA-1: b51bf516275dccccc44e79c37855166d546cb1c4 SHA-256: 46387a49997ae321a7742dc7861214f371a6f249c03c75d7cf7468d11aaa35fa
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to `https://ttraff.cc/pify?keyword=j+cole+middle+child+mp3`. This URL is presented within the document body, disguised as a link to an MP3 file. The ML classifier also strongly indicated maliciousness. The document appears to be a lure to trick users into clicking the malicious link.

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=j+cole+middle+child+mp3
    • http://files.biocoreintegration.com/uploads/1/3/1/3/131380591/4215050.pdf
    • http://fedel.huntsvilleschoolofkarate.com/uploads/1/3/0/8/130874388/pukoke.pdf
    • https://cdn.shopify.com/s/files/1/0430/5820/0725/files/multiplication_and_division_printable_worksheets_grade_3.pdf
    • https://cdn.shopify.com/s/files/1/0431/6764/5852/files/11249850170.pdf
    • https://cdn.shopify.com/s/files/1/0454/3342/1982/files/gcse_astronomy_textbook.pdf
    • https://cdn.shopify.com/s/files/1/0431/4746/0768/files/15991151883.pdf
    • https://cdn.shopify.com/s/files/1/0429/6287/8618/files/66400819684.pdf
    • https://cdn.shopify.com/s/files/1/0434/2294/1351/files/32564802171.pdf
    • https://cdn.shopify.com/s/files/1/0433/1218/5502/files/wallpaper_photo_gallery_mp4.pdf
    • https://cdn.shopify.com/s/files/1/0437/2057/3080/files/93948718476.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/xibirinadinabamagumib.pdf
    • https://cdn.shopify.com/s/files/1/0430/8421/8532/files/quarterly_report_icsi_online.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_off00004dca.bin
6522efb94a56287031486b36d3564105c7ae057ea0b9a011c2fa7aaf2901475a
pdf-font-stream PDF embedded font (sfnt) at offset 0x4DCA 4584 bytes
font_01_sfnt_off00005d57.bin
8e04916096dc795d9278d75aa68d41e3bb4f6510914b1fd6a36b7a6b91c93489
pdf-font-stream PDF embedded font (sfnt) at offset 0x5D57 10040 bytes
font_02_sfnt_off00007fb2.bin
ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230
pdf-font-stream PDF embedded font (sfnt) at offset 0x7FB2 4324 bytes