Malicious PDF — malware analysis report

Static analysis result for SHA-256 0067e4fb7faa036b…

MALICIOUS

PDF

40.8 KB Created: 2020-08-17 02:36:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6a5945f9bd8d971de0d2e28c3786c6a6 SHA-1: acc84aa83e7d81710557b8182662da0bdc31cf10 SHA-256: 0067e4fb7faa036b738ae3695e747dba49f92e298c05490fe423cb936fac57d3
154 Risk Score

Malware Insights

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

The PDF document contains a link to a known malicious redirector, ttraff.ru, disguised as an educational worksheet. This redirector likely leads to further malicious content or exploits. The ML classifier strongly indicated maliciousness, and the PDF structure includes a mass of external links, characteristic of SEO poisoning or link farm tactics to improve search engine visibility for malicious 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.ru/pify?keyword=length+metric+unit+conversion+worksheet
    • http://wurep.krshairandwaxstudio.com/uploads/1/3/2/6/132696021/53ce4320dd443.pdf
    • http://golapefov.larcie.com/uploads/1/3/1/1/131164250/bubaf-kasidatiregak.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/2816/0417/files/47335323102.pdf
    • https://cdn.shopify.com/s/files/1/0431/5214/6587/files/wodebijaduborulifezun.pdf
    • https://cdn.shopify.com/s/files/1/0431/0990/8637/files/41653355808.pdf
    • https://cdn.shopify.com/s/files/1/0428/6598/3655/files/disinorovakim.pdf
    • https://cdn.shopify.com/s/files/1/0447/9310/2493/files/bombay_high_court_recruitment_2020_clerk_exam_paper.pdf
    • https://cdn.shopify.com/s/files/1/0435/1783/7467/files/38481574728.pdf
    • https://cdn.shopify.com/s/files/1/0430/6668/7639/files/vusafa.pdf
    • https://cdn.shopify.com/s/files/1/0430/4273/4237/files/husqvarna_sewing_machine_manual.pdf
    • https://cdn.shopify.com/s/files/1/0429/1916/6105/files/rogukavuwisi.pdf
    • https://cdn.shopify.com/s/files/1/0427/7754/2823/files/pebupifep.pdf
    • https://cdn.shopify.com/s/files/1/0431/7777/1162/files/artificial_intelligence_in_cyber_security.pdf
    • https://cdn.shopify.com/s/files/1/0433/7680/3990/files/linapabaneraxu.pdf
    • https://cdn.shopify.com/s/files/1/0428/3262/5831/files/53383264341.pdf
    • https://cdn.shopify.com/s/files/1/0441/2506/1272/files/contexto_de_la_intervencion_social.pdf
    • https://cdn.shopify.com/s/files/1/0437/6369/5770/files/vector_calculus_free_download.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_off00006271.bin
357207b13a8fd7e80c9349cf7edf8c20e119cdd7c300c68b8dcf6fd9934555dd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6271 5128 bytes
font_01_sfnt_off000073d2.bin
0442c77b1e9691fd0e2c717201f26b92311da3cdb11fad8987ae6943d9ae443b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x73D2 9896 bytes

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