Malicious PDF — malware analysis report

Static analysis result for SHA-256 89f0d9d2906bcb8d…

MALICIOUS

PDF

47.0 KB Created: 2020-08-05 16:24:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: da6d9badd93145d2cdd1224caafd9d78 SHA-1: 8092721a0ac4689ccc767cedfaaa5467ff5cfaf6 SHA-256: 89f0d9d2906bcb8dcd022b49ec1b1ca4fbe780a9af82955fb3551f2b89b88231
152 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing for a malicious redirector. The document body, though partially corrupted, includes text suggesting a search result for a book, which is a common lure. The primary malicious IOC is the redirector URL, which is likely used to funnel victims to further malicious sites. No scripts were extracted from this sample.

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=malayala+manorama+year+book+2020+pdf
    • http://files.maheenkhizar.com/uploads/1/3/1/4/131438891/8583267.pdf
    • http://rozowumoj.perrykomdat.com/uploads/1/3/1/4/131407901/jegojek-dagovobom-fimexi.pdf
    • http://files.djangodough.com/uploads/1/3/1/3/131398131/zujapovixabur-pitufutova.pdf
    • https://cdn.shopify.com/s/files/1/0431/1593/7948/files/bobby_goldsboro_honey.pdf
    • https://cdn.shopify.com/s/files/1/0431/8589/7627/files/24112532530.pdf
    • https://cdn.shopify.com/s/files/1/0439/2566/7995/files/pisobixonakozetofojosegom.pdf
    • https://cdn.shopify.com/s/files/1/0431/2442/4853/files/90093180107.pdf
    • https://cdn.shopify.com/s/files/1/0435/1511/7727/files/amebiasis_intestinal_mexico.pdf
    • https://cdn.shopify.com/s/files/1/0449/3144/9000/files/hitman_absolution_cheats.pdf
    • https://cdn.shopify.com/s/files/1/0431/8789/6488/files/lejurozejaduvosarojapuf.pdf
    • https://cdn.shopify.com/s/files/1/0431/9834/9471/files/essentials_of_corporate_finance.pdf
    • https://cdn.shopify.com/s/files/1/0430/2385/9873/files/fosuxepa.pdf
    • https://cdn.shopify.com/s/files/1/0434/9159/0308/files/58101818974.pdf
    • https://cdn.shopify.com/s/files/1/0435/7423/1199/files/fofunanubufa.pdf
    • https://cdn.shopify.com/s/files/1/0428/5975/7734/files/lakijifopubuxezu.pdf
    • https://cdn.shopify.com/s/files/1/0437/9276/0981/files/workforce_planning_template.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005a5a.bin
9829cd16bcba2e2e2a5d2c34e1d25a41200bc1eb0c54ffa0ba03138651b1ab90		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5A5A 5596 bytes
font_01_sfnt_off00006d5b.bin
246569b5fd7226bd0ebf3c016de7ba0bf82e996896d660a08030b2af0a08efd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D5B 1936 bytes
font_02_sfnt_off0000769b.bin
fb7a1c1474449aa539219cc66fc769f5c409d7f526bac15685b2c57db99090d8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x769B 9856 bytes
font_03_sfnt_off0000988a.bin
9c47a8ecf7103172530608de19fa11afb8a035ab51042e9cb8c6809f09ebb189		 pdf-font-stream PDF embedded font (sfnt) at offset 0x988A 16344 bytes

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