Malicious PDF — malware analysis report

Static analysis result for SHA-256 8d08f833d94262fc…

MALICIOUS

PDF

46.7 KB Created: 2020-08-10 09:52:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: aa5ccfb2aea489fb2ac109f5ce080530 SHA-1: 66b6b4fe4a86c759f38f944526af8d65610c3173 SHA-256: 8d08f833d94262fce79eabb50834ba69423272a465f19ab986384ca91788139e
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a redirector service (ttraff.cc) known for malicious activity. The document body is heavily obfuscated and contains a URL that appears to be part of a link farm designed to manipulate search engine results. The presence of numerous Shopify-hosted PDFs suggests an attempt to disguise malicious links within seemingly legitimate content. No scripts were extracted from this sample.

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.cc/pify?keyword=developing+countries+characteristics+pdf
    • http://files.safeaccess4uas.com/uploads/1/3/2/6/132682106/vonobuveg_vojexiteda_tafezawixe_mosopiva.pdf
    • http://files.mosssnowsticksouthpacific.com/uploads/1/3/0/8/130813855/mikimewumipi.pdf
    • http://files.monashsoccerclub.com/uploads/1/3/0/7/130738951/zidizew_ruxagovepagen.pdf
    • https://cdn.shopify.com/s/files/1/0436/9291/6891/files/tibumevigoduze.pdf
    • https://cdn.shopify.com/s/files/1/0429/7680/5013/files/rofifabonemofanoti.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/63529720688.pdf
    • https://cdn.shopify.com/s/files/1/0429/1733/1100/files/remigevelepiduxotanemoku.pdf
    • https://cdn.shopify.com/s/files/1/0432/5546/4104/files/4861407605.pdf
    • https://cdn.shopify.com/s/files/1/0440/0090/3318/files/61166039577.pdf
    • https://cdn.shopify.com/s/files/1/0434/0911/3253/files/25542546193.pdf
    • https://cdn.shopify.com/s/files/1/0430/0167/5939/files/46676632794.pdf
    • https://cdn.shopify.com/s/files/1/0431/1141/5959/files/zadogikenufawom.pdf
    • https://cdn.shopify.com/s/files/1/0432/7807/4020/files/48571073567.pdf
    • https://cdn.shopify.com/s/files/1/0430/2936/4885/files/mokivazawojumewiwafozike.pdf
    • https://cdn.shopify.com/s/files/1/0431/9408/9635/files/zofos.pdf
    • https://cdn.shopify.com/s/files/1/0432/4042/3592/files/binary_to_gray_code_conversion_truth_table.pdf
    • https://www.cancer.gov/coronavirus
    • 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_off000075cd.bin
61c6b90e0749b92c5a74998da2e70653dc5cb65238729dac13681f90b1d7e9dd
pdf-font-stream PDF embedded font (sfnt) at offset 0x75CD 5476 bytes
font_01_sfnt_off0000887b.bin
c9b7554e42441fa4719c7ec30388a352412509b2cc516184c2280299c5e24a0b
pdf-font-stream PDF embedded font (sfnt) at offset 0x887B 11032 bytes