Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd07780ec0cc1d61…

MALICIOUS

PDF

44.1 KB Created: 2020-07-21 07:30:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8a74470505ceabed30cdad5d7ab15360 SHA-1: bbb1adc8ab4a08e021bceee89ec3535f73819a85 SHA-256: fd07780ec0cc1d612d105b3d92300d132167fbd9e8afbca623110a047a91b2ed
120 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with a critical heuristic firing indicating a malicious redirector. One of the primary links directs to 'ttraff.com', which is flagged as a malicious redirector. Another heuristic identified a large number of external PDF links, suggesting a link farm or SEO spamming technique. The document body, though heavily obfuscated, contains text related to 'uji validitas' (validity test) and mentions 'wkhtmltopdf', indicating it's likely a lure to a malicious site.

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.com/wb?keyword=cara%20melakukan%20uji%20validitas%20secara%20manual
    • http://files.karmaple.com/uploads/1/3/2/6/132696048/zurug.pdf
    • http://files.memphistutorial.com/uploads/1/3/2/7/132711983/8235babf44f4064.pdf
    • http://files.anniepercussion.com/uploads/1/3/2/7/132740321/disatibe.pdf
    • http://files.jrlockandsecure.co.uk/uploads/1/3/1/6/131606688/mezesuv.pdf
    • http://files.kidseventtickets.com/uploads/1/3/1/8/131872048/gujaduvaginub.pdf
    • http://files.memphistutorial.com/uploads/1/3/2/7/132711983
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/gojifazuxosupimuron.pdf
    • https://cdn.shopify.com/s/files/1/0437/2506/2298/files/95847325951.pdf
    • https://cdn.shopify.com/s/files/1/0439/0230/4408/files/zawuzibezuva.pdf
    • https://mobulafa.files.wordpress.com/2020/07/6314444046.pdf
    • https://pejalixem.files.wordpress.com/2020/06/sinusamadod.pdf
    • https://tigifelaziv.files.wordpress.com/2020/06/zitunajokugujiregifivu.pdf
    • https://bagikib.files.wordpress.com/2020/06/tuzojuwigeku.pdf
    • https://pivakira.files.wordpress.com/2020/06/19700494895.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/nidosavexurirevinuno.pdf
    • https://cdn.shopify.com/s/files/1/0429/4865/7318/files/sobepigivizekoteniweririg.pdf
    • https://cdn.shopify.com/s/files/1/0431/8180/1629/files/gofirofimotizamogizif.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/38970143778.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/45035229099.pdf
    • https://cdn.shopify.com/s/files/1/0428/5235/2159/files/nizazedige.pdf
    • https://cdn.shopify.com/s/files/1/0428/1538/9855/files/56721933979.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_off00006fa6.bin
830725b522d4fd8b216c7f6996a32892e901b6fba466033899c078981a841474
pdf-font-stream PDF embedded font (sfnt) at offset 0x6FA6 5080 bytes
font_01_sfnt_off000080dc.bin
640d05d420134af131e3da5207abbc96199c3d67fc8cb6fad9f457da531b66d8
pdf-font-stream PDF embedded font (sfnt) at offset 0x80DC 9940 bytes