Malicious PDF — malware analysis report

Static analysis result for SHA-256 012fb35f2e69c206…

MALICIOUS

PDF

49.1 KB Created: 2020-08-04 23:30:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2bf80eae4e098fffa310e8f286c228ae SHA-1: 5f10630e423f3896527d1a3df4b8377fe1caec65 SHA-256: 012fb35f2e69c2068b033a6dfb1216a508dad824e75dd7092c57ef4e27eb1ff1
154 Risk Score

Malware Insights

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

The PDF document contains a link farm and a malicious redirector URL, indicating a phishing or malware distribution attempt. The primary malicious URL identified is https://ttraff.cc/pify?keyword=20+amino+acids+and+their+structures+and+functions+pdf, which likely leads to a malicious payload. The document body, though partially corrupted, contains references to academic content and the tool used to generate the PDF, suggesting a lure to disguise 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://ttraff.cc/pify?keyword=20+amino+acids+and+their+structures+and+functions+pdf
    • http://files.strathmorechildrenschoir.com/uploads/1/3/0/7/130739222/8739174.pdf
    • http://files.utahclassicalconversations.com/uploads/1/3/2/7/132712251/joxis_junam_toxulit.pdf
    • http://files.inkycycling.com/uploads/1/3/1/4/131411857/3621525.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/8799/4792/files/64535741766.pdf
    • https://cdn.shopify.com/s/files/1/0435/4516/5975/files/91617898823.pdf
    • https://cdn.shopify.com/s/files/1/0436/4707/4464/files/thermodynamics_cengel_7th.pdf
    • https://cdn.shopify.com/s/files/1/0431/6587/6379/files/1082051163.pdf
    • https://cdn.shopify.com/s/files/1/0438/1409/2960/files/google_drive_symlink.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/84302935330.pdf
    • https://cdn.shopify.com/s/files/1/0431/4995/1138/files/xukom.pdf
    • https://cdn.shopify.com/s/files/1/0428/2921/7958/files/47589590935.pdf
    • https://cdn.shopify.com/s/files/1/0430/0252/7895/files/tumuvikewuj.pdf
    • https://cdn.shopify.com/s/files/1/0430/5007/4269/files/nijosuletigagidobifefar.pdf
    • https://cdn.shopify.com/s/files/1/0428/5100/8671/files/44588100728.pdf
    • https://cdn.shopify.com/s/files/1/0440/0742/4158/files/32268154111.pdf
    • https://cdn.shopify.com/s/files/1/0428/6650/7942/files/12370346512.pdf
    • https://cdn.shopify.com/s/files/1/0431/6931/7020/files/91043665604.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_off000082de.bin
5591aff4e8f0317199650bc43fd60d4b0db226974ba42f058f411b6c49e1824c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x82DE 5544 bytes
font_01_sfnt_off00009586.bin
d1efe96772d96cd8c5cbcd02a08465f36bdfa02444cb5efd299d21471b0eeb97		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9586 9908 bytes

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