Malicious PDF — malware analysis report

Static analysis result for SHA-256 77b51e2c09a61948…

MALICIOUS

PDF

50.0 KB Created: 2020-08-07 08:42:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0a1d962c187af6205f8d30ec90c3ceff SHA-1: 8be1cc54bfaafcf75c5d7925f1934b73bd898289 SHA-256: 77b51e2c09a619480ffce25f60ca7b76e551e1b3ee8cc1c3f8b88bddb8323562
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a large number of embedded links, many of which point to external PDF files, suggesting a link farm or SEO manipulation tactic. One of the primary links, 'https://ttraff.com/pify?keyword=carols+for+choirs+1+pdf+free', is identified as a malicious redirector. This indicates the document's purpose is to redirect users to potentially harmful websites.

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=carols+for+choirs+1+pdf+free
    • http://files.albertpyun.net/uploads/1/3/2/6/132681504/2ad85.pdf
    • http://files.kalaemano.com/uploads/1/3/0/8/130813777/babodumesud-bebowepefabif.pdf
    • http://files.johnhain.com/uploads/1/3/1/8/131856365/f3521e4caf3.pdf
    • http://files.adriantobinartist.com/uploads/1/3/2/8/132814276/nuwejowam.pdf
    • http://files.bestcannabiscancer.com/uploads/1/3/1/6/131606876/nimetami.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0436/8993/5003/files/wufivejuzefanesisog.pdf
    • https://cdn.shopify.com/s/files/1/0430/7006/2754/files/nejuta.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/livoxigugefeguvon.pdf
    • https://cdn.shopify.com/s/files/1/0429/1425/0905/files/33035275316.pdf
    • https://cdn.shopify.com/s/files/1/0429/6025/7177/files/13367858492.pdf
    • https://cdn.shopify.com/s/files/1/0445/5481/3599/files/baby_bloomers_pattern_free.pdf
    • https://cdn.shopify.com/s/files/1/0430/6888/3106/files/xonozanuvowonalubole.pdf
    • https://cdn.shopify.com/s/files/1/0433/7614/8638/files/xuzivunukovamopafiviju.pdf
    • https://cdn.shopify.com/s/files/1/0433/8457/0019/files/autocad_commands_in.pdf
    • https://cdn.shopify.com/s/files/1/0431/5054/0964/files/84896788754.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/xigorekotat.pdf
    • https://cdn.shopify.com/s/files/1/0431/0152/0023/files/16048133165.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_off00007dc7.bin
5b8db5b6014cb33baa4818762df6f08cd0778306301bc2f03be6561dacfb89f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7DC7 5200 bytes
font_01_sfnt_off00008f72.bin
83d3f00422493c8ef6a030d572f642f0eb69cfe6dbc83e2bbb71f464129f8f9a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8F72 14160 bytes

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