Malicious PDF — malware analysis report

Static analysis result for SHA-256 06c7497d91549781…

MALICIOUS

PDF

48.6 KB Created: 2020-08-08 03:21:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d798701cbab69ba9f8ad118124a80743 SHA-1: ae1a5ab459b251e43b1e3cbac13ec3dc523da9c4 SHA-256: 06c7497d91549781f1dd2cac23a94a7ea1cf7b49d5f0dafe7a1e5d8552d55399
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links, with one specifically pointing to a known malicious redirector infrastructure. The document body, though heavily obfuscated, contains text related to "Algebra 2 textbook pdf" and the malicious URL, suggesting a lure to trick users into clicking the link. The presence of a large number of external PDF links further indicates a link farm or SEO poisoning attempt.

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.ru/pify?keyword=algebra+2+textbook+pdf
    • http://files.adp-revisited.org/uploads/1/3/2/7/132740338/xufugukibixiz.pdf
    • http://fedak.glendamilitano.com/uploads/1/3/2/6/132681245/kurutu_wipunesakijixa_fimotu_gevonubef.pdf
    • http://bipiti.leahmichelleart.com/uploads/1/3/1/6/131637136/nebemitediba_vaxiduxofa.pdf
    • http://files.olympicroundup.org/uploads/1/3/1/4/131453232/ranena.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0429/3663/1452/files/metijaruxanamuxaw.pdf
    • https://cdn.shopify.com/s/files/1/0434/7772/9432/files/54194615993.pdf
    • https://cdn.shopify.com/s/files/1/0434/6406/5188/files/wavaz.pdf
    • https://cdn.shopify.com/s/files/1/0438/2529/9613/files/78768450729.pdf
    • https://cdn.shopify.com/s/files/1/0434/5099/0753/files/68126819900.pdf
    • https://cdn.shopify.com/s/files/1/0433/1739/5614/files/20340874845.pdf
    • https://cdn.shopify.com/s/files/1/0436/0205/1229/files/17441673777.pdf
    • https://cdn.shopify.com/s/files/1/0430/3365/7495/files/busawozikesuxibunatalad.pdf
    • https://cdn.shopify.com/s/files/1/0430/9165/6855/files/ak_47_gungeon.pdf
    • https://cdn.shopify.com/s/files/1/0431/5670/1348/files/kulatugejumewadebuzulak.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/83583068491.pdf
    • https://cdn.shopify.com/s/files/1/0436/4202/8182/files/51680054633.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007227.bin
796bd8eb5cf6026ca4bf492d29465c68c25565d0ec49099e377189bccc358c19		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7227 5056 bytes
font_01_sfnt_off00008376.bin
203725e64cdc919da09085794fe43d5753ed47c6f048f42a4b64715c03c51306		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8376 10600 bytes
font_02_sfnt_off0000a7a0.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA7A0 4324 bytes

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