Malicious PDF — malware analysis report

Static analysis result for SHA-256 95e4a8240d86f003…

MALICIOUS

PDF

50.7 KB Created: 2020-08-10 13:34:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 62087d0fae21b89181ea51f5bed36a49 SHA-1: 86759af5ca3bc9df9627e8c6a91b37a58aefc057 SHA-256: 95e4a8240d86f003c299529cff80fedc39a98a99d9a752108053e5cb8cabc296
120 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with one specifically pointing to a known malicious redirector. The document body, though heavily obfuscated, contains text related to 'worksheet pdf' and the malicious URL, suggesting a lure to trick users into clicking the link. The primary heuristic indicates the PDF links to malicious redirector infrastructure, and the presence of many external links further supports this. The file's purpose appears to be redirecting users to 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=bruch+dezimalzahl+prozent+arbeitsblatt+pdf
    • http://files.jkcreative.co.uk/uploads/1/3/1/3/131380591/a92841.pdf
    • http://files.flawlessfrenchies.com/uploads/1/3/1/4/131482826/ad44ddf4.pdf
    • http://files.stjosephiota.org/uploads/1/3/0/8/130813639/nuvujem_tanunasufim_modet_nijitotowomi.pdf
    • http://fejiloso.castros-concrete.com/uploads/1/3/0/8/130874655/mamuzo_zekabuvuteze_sunubasunug.pdf
    • https://cdn.shopify.com/s/files/1/0434/0505/0008/files/8359169070.pdf
    • https://cdn.shopify.com/s/files/1/0440/6755/3430/files/guia_pratico_de_alimentao_saudavel.pdf
    • https://cdn.shopify.com/s/files/1/0450/9509/2376/files/formwork_for_concrete_7th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0439/9906/8310/files/pezemojukedetokokubama.pdf
    • https://cdn.shopify.com/s/files/1/0447/9988/5463/files/sawodufudeseseviwesu.pdf
    • https://cdn.shopify.com/s/files/1/0430/1747/0101/files/nppr9-_fwdcx-_d2c8j-_h872k-_2yt43.pdf
    • https://cdn.shopify.com/s/files/1/0432/1614/2497/files/xujadetix.pdf
    • https://cdn.shopify.com/s/files/1/0428/1332/5471/files/senate_jobs_bulletin.pdf
    • https://cdn.shopify.com/s/files/1/0437/4790/1592/files/razixadevige.pdf
    • https://cdn.shopify.com/s/files/1/0431/4667/4330/files/kulajitigujowiludenuxit.pdf
    • https://cdn.shopify.com/s/files/1/0431/2177/0656/files/6531938565.pdf
    • https://cdn.shopify.com/s/files/1/0432/8262/8766/files/32811080242.pdf
    • https://cdn.shopify.com/s/files/1/0433/5131/0488/files/pizajorodebe.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_off00007ad4.bin
8a782b76b4af67c4689f5b23a56f76aa0ed57e7ce298b6c40c66c3cf1e835a15
pdf-font-stream PDF embedded font (sfnt) at offset 0x7AD4 5636 bytes
font_01_sfnt_off00008dd4.bin
f123a07393058eb2b242fae7da1dc0746876a941fa74508b61ba6de3e113dda5
pdf-font-stream PDF embedded font (sfnt) at offset 0x8DD4 14676 bytes