Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e101d79627b0a1a…

MALICIOUS

PDF

38.4 KB Created: 2020-08-28 12:53:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 258b10801e5c7b72676ec2225f7a0d92 SHA-1: 78c7c33c21cb0ba87b8c5f1b60919167081e6ee9 SHA-256: 0e101d79627b0a1a57f30003ea853a7cec43997f2c32ef0f18a4b08c2fc823db
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links, with one identified as a malicious redirector. The document body, though partially corrupted, contains text related to 'classifying triangles' and includes the malicious URL, suggesting a lure to a phishing or malware distribution site. The presence of a link farm heuristic further supports the malicious intent of directing users to external, potentially harmful, content.

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=classifying+triangles+based+on+angle
    • http://files.extremeluxurygetaways.com/uploads/1/3/1/3/131379040/gasixada.pdf
    • http://files.terraverdehomestead.com/uploads/1/3/0/7/130776749/3cc0d85d9b1.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0436/0021/6232/files/wobenigaz.pdf
    • https://cdn.shopify.com/s/files/1/0462/0019/3182/files/64398722376.pdf
    • https://cdn.shopify.com/s/files/1/0434/3165/7621/files/69316895390.pdf
    • https://cdn.shopify.com/s/files/1/0433/4610/0392/files/brooklyn_nine_nine_episodes_guide.pdf
    • https://cdn.shopify.com/s/files/1/0431/1020/3556/files/ruwiropolodiw.pdf
    • https://cdn.shopify.com/s/files/1/0431/4356/1376/files/fidenin.pdf
    • https://cdn.shopify.com/s/files/1/0433/8450/4474/files/business_process_analyst_job_description.pdf
    • https://cdn.shopify.com/s/files/1/0431/6554/8708/files/37111190698.pdf
    • https://cdn.shopify.com/s/files/1/0429/8113/0394/files/maliziwinusuw.pdf
    • https://cdn.shopify.com/s/files/1/0429/1058/0899/files/duty_to_report_elder_abuse_in_canada.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_off0000577c.bin
31bb9ea2c1c3f8e9b39ebb63acd6e01abaaacf03873a4e4635e9392de7639040
pdf-font-stream PDF embedded font (sfnt) at offset 0x577C 5224 bytes
font_01_sfnt_off00006947.bin
7adc710a8ff50917af5d525f49de00ff7b2b9a99884476ff1ff1227868522097
pdf-font-stream PDF embedded font (sfnt) at offset 0x6947 10612 bytes