Malicious PDF — malware analysis report

Static analysis result for SHA-256 8dcbfdb9715a9419…

MALICIOUS

PDF

52.8 KB Created: 2020-08-07 19:16:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 307a0e1a0b766c91413442fe3cc80988 SHA-1: 7eff6efa9fd4553fdc5efdfe7c9bd2d367e480f9 SHA-256: 8dcbfdb9715a941903940d296c0400f13c3df14f33b1eb851b87218fe0b3485b
152 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. The document body, though heavily obfuscated, contains the same URL, suggesting it's the primary lure. The PDF also exhibits characteristics of a link farm, with numerous embedded URLs, many pointing to Shopify domains, likely for SEO manipulation to improve search engine ranking for malicious content. The ML classifier strongly indicated maliciousness.

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.com/pify?keyword=angielski+czasy+tera%25C5%25BAniejsze+%25C4%2587wiczenia+pdf
    • http://files.genestewartrealestate.com/uploads/1/3/1/4/131482941/3491343.pdf
    • http://files.meganhensonphotography.com/uploads/1/3/1/6/131606348/gabojiraxes.pdf
    • http://files.yoursinfashion.com/uploads/1/3/1/3/131383283/josem_gujevebibi_bosixat.pdf
    • http://jebot.tjihouse.org/uploads/1/3/0/7/130776791/lobiwez.pdf
    • https://cdn.shopify.com/s/files/1/0431/5093/4173/files/54502395126.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/15518423203.pdf
    • https://cdn.shopify.com/s/files/1/0430/0642/7289/files/63523274797.pdf
    • https://cdn.shopify.com/s/files/1/0432/3983/3767/files/53907407573.pdf
    • https://cdn.shopify.com/s/files/1/0427/6345/2583/files/bescherelle_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0431/4375/7992/files/48101944362.pdf
    • https://cdn.shopify.com/s/files/1/0435/9494/0573/files/71568555654.pdf
    • https://cdn.shopify.com/s/files/1/0430/4224/2709/files/katufikemiwonisefojemajo.pdf
    • https://cdn.shopify.com/s/files/1/0427/5427/7532/files/sadoduropujemavizifol.pdf
    • https://cdn.shopify.com/s/files/1/0428/5664/4774/files/kunovalomufudunupatum.pdf
    • https://cdn.shopify.com/s/files/1/0432/3858/8584/files/fexineberev.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/54171278856.pdf
    • https://cdn.shopify.com/s/files/1/0437/7434/5365/files/fizulavus.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_off0000697f.bin
bb785a34b91d201b5df1d256a4ce72f77fb5e836fa9eea6366705012c1e06ba9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x697F 5908 bytes
font_01_sfnt_off00007d81.bin
3ee75714655d7459a967abcc40ed44234675d6606b6ea5b999cebc0fda32f2c1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7D81 10296 bytes
font_02_sfnt_off00009ec2.bin
d45db68784c880c13daf7a3db050f2ab1fcbdb08405f07e45b4c6b2beec7f3f1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9EC2 11496 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.