Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec2ceec403621ae4…

MALICIOUS

PDF

44.7 KB Created: 2020-08-19 06:36:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 822aec765dc0bd2897e7379fbaa54e50 SHA-1: 95500f7fadeb0d3585c957679194f5fd77a3b9ce SHA-256: ec2ceec403621ae43542ab4b22cd2d9da99d2e4b42e3b5d3df1c2f2051f093c7
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a large number of embedded links, with one specifically identified as a malicious redirector. The document body text, though garbled, contains the same URL as the malicious redirector, suggesting an attempt to lure users to malicious infrastructure. The presence of numerous external PDF links, many hosted on Shopify, indicates a potential SEO manipulation or link farm strategy to distribute malicious content.

Heuristics 3

  • 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.
  • 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=acute+coronary+syndrome+guidelines+south+africa
    • http://files.regalsalons.com/uploads/1/3/2/8/132816202/95d9a95b3.pdf
    • https://cdn.shopify.com/s/files/1/0431/1800/2340/files/fases_del_aprendizaje_basado_en_problemas.pdf
    • https://cdn.shopify.com/s/files/1/0434/6386/8573/files/miran.pdf
    • https://cdn.shopify.com/s/files/1/0428/3380/5471/files/9798564711.pdf
    • https://cdn.shopify.com/s/files/1/0432/0067/6001/files/51836520229.pdf
    • https://cdn.shopify.com/s/files/1/0435/5496/3617/files/65126928939.pdf
    • https://cdn.shopify.com/s/files/1/0439/2304/6555/files/alimentos_que_contienen_vitamina_c.pdf
    • https://cdn.shopify.com/s/files/1/0429/0481/3721/files/64563919338.pdf
    • https://cdn.shopify.com/s/files/1/0432/4478/1735/files/storytelling_with_data_cole_nussbaumer.pdf
    • https://cdn.shopify.com/s/files/1/0434/2402/2690/files/lucky_block_mod_for_minecraft_pe_android.pdf
    • https://cdn.shopify.com/s/files/1/0431/4211/9592/files/bible_history_telugu.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/ligumugazawebamupewav.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000070b2.bin
9ad7bd8359f604bbded581fa1e2bfa31c0c67132c65ea5da30272bfcc51108e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x70B2 5524 bytes
font_01_sfnt_off00008358.bin
c9989da6a08941311db2867dde536a3936de88a7026b8ccae0c127b7223b3c3c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8358 10168 bytes

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