Malicious PDF — malware analysis report

Static analysis result for SHA-256 9835abde2a0247a6…

MALICIOUS

PDF

73.3 KB Created: 2020-08-14 23:59:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a0bf241d6c0acec201878a4ff749b86c SHA-1: f1a70babfe54cfc072f95b237a600a6eb8d6a626 SHA-256: 9835abde2a0247a6dcffde02e8ed8c20bb331e121c172f295cf6e66495b85825
150 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link disguised as 'free carson dellosa worksheets'. This link points to 'ttraff.ru', which is flagged as malicious infrastructure. The document also exhibits characteristics of a link farm, with numerous embedded URLs, many pointing to Shopify domains hosting PDF files. The primary intent appears to be directing users to a malicious site through a deceptive lure.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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=free+carson+dellosa+worksheets
    • http://files.celenderthescreenwriter.com/uploads/1/3/2/7/132740763/02b4df35ab91.pdf
    • http://files.pcwrf.com/uploads/1/3/1/3/131398010/saxawubakajezen.pdf
    • http://files.pleasantvalleyschoolmontana.org/uploads/1/3/1/8/131857914/05b36e62d7.pdf
    • http://files.doylestcafe.com/uploads/1/3/1/6/131636677/e4ae90487.pdf
    • https://cdn.shopify.com/s/files/1/0429/8424/3351/files/mesob.pdf
    • https://cdn.shopify.com/s/files/1/0434/5865/8456/files/38247388294.pdf
    • https://cdn.shopify.com/s/files/1/0431/4411/8434/files/asme_bpvc_section_viii.pdf
    • https://cdn.shopify.com/s/files/1/0431/7921/2959/files/fe_reference_handbook_9._4_edition.pdf
    • https://cdn.shopify.com/s/files/1/0427/8750/4294/files/mac_show_hidden_files.pdf
    • https://cdn.shopify.com/s/files/1/0434/1871/4264/files/93984272149.pdf
    • https://cdn.shopify.com/s/files/1/0428/5045/1623/files/22757704213.pdf
    • https://cdn.shopify.com/s/files/1/0435/8966/4926/files/como_mejorar_el_autoestima.pdf
    • https://cdn.shopify.com/s/files/1/0433/4636/2533/files/36048045566.pdf
    • https://cdn.shopify.com/s/files/1/0434/7317/4680/files/xibotaxevo.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_off0000e4b3.bin
fa54ba11eb310edc952054d6546dae643dcbb7675610d2c8a992bbbda2845a40		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE4B3 5136 bytes
font_01_sfnt_off0000f632.bin
fe56e5f75f4d60323535a0f5328f1bf969ac8e41068247c9d6adc84870ed7485		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF632 10000 bytes

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