Malicious PDF — malware analysis report

Static analysis result for SHA-256 8c07c1f070ce5e8b…

MALICIOUS

PDF

39.9 KB Created: 2020-08-26 09:52:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c24dc561d4b77a6097206b55e5668f87 SHA-1: 539bfe23e88f71a01b5c790c14d275b128dde873 SHA-256: 8c07c1f070ce5e8bc7a0153a103d7dbf12cd516da132d39521929ee0fc2dcd62
128 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a malicious redirector. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' confirms the redirector's malicious nature. The 'SE_INVOICE_LURE' heuristic suggests the document is designed to trick users into clicking the links by posing as an invoice or payment request. No scripts were extracted, and the document body was largely unreadable, but the link farm and redirector are strong indicators of a phishing or scam attempt.

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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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=canape+abatible+yecol
    • http://teduga.b-dogdesign.nl/uploads/1/3/1/4/131406535/6897724.pdf
    • http://files.dkgindiana.org/uploads/1/3/1/3/131379899/5456504.pdf
    • http://files.ontracksimulation.com/uploads/1/3/0/8/130874201/vafodadonaz_taxivawidifogu.pdf
    • https://cdn.shopify.com/s/files/1/0431/8239/1451/files/wolutujurokeru.pdf
    • https://cdn.shopify.com/s/files/1/0434/5472/6310/files/mathematics_for_management_and_finance_shao.pdf
    • https://cdn.shopify.com/s/files/1/0435/5181/7883/files/aromanian_language.pdf
    • https://cdn.shopify.com/s/files/1/0434/2949/4936/files/54400615658.pdf
    • https://cdn.shopify.com/s/files/1/0434/2343/2861/files/phonics_sounds_list.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/44411244229.pdf
    • https://cdn.shopify.com/s/files/1/0428/5893/8531/files/74306781127.pdf
    • https://cdn.shopify.com/s/files/1/0433/4066/0891/files/44593280015.pdf
    • https://cdn.shopify.com/s/files/1/0432/8180/9558/files/72755517712.pdf
    • https://cdn.shopify.com/s/files/1/0432/2816/8359/files/pan_africanism_summary.pdf
    • https://cdn.shopify.com/s/files/1/0431/7849/2062/files/70324940415.pdf
    • https://cdn.shopify.com/s/files/1/0435/1941/0335/files/speak_english_podcast_com_004.pdf
    • https://cdn.shopify.com/s/files/1/0431/8865/0135/files/sivutixuvabubegudigalafew.pdf
    • https://cdn.shopify.com/s/files/1/0440/6598/0581/files/doweja.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_off00005e07.bin
008c1d96022402d6a75604a6815f1f8870873399cbd91c72876a8090a0b941a0
pdf-font-stream PDF embedded font (sfnt) at offset 0x5E07 4800 bytes
font_01_sfnt_off00006e6d.bin
ea4e5a06371df8bfd8ef0812ddfa7848fd16b37bb883a245ce76a318225e14b5
pdf-font-stream PDF embedded font (sfnt) at offset 0x6E6D 10740 bytes