Malicious PDF — malware analysis report

Static analysis result for SHA-256 bdd1345fd7e3b136…

MALICIOUS

PDF

40.3 KB Created: 2020-08-20 20:14:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 93b9d4e2dc43224c0ccd24da230bcc42 SHA-1: dd9cf8deec0190014e8f951dd9a032331d8417cc SHA-256: bdd1345fd7e3b13651a89723e0fc9065dcedc4f871175582cce00f3c2f332d48
120 Risk Score

Malware Insights

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

The PDF contains a link that redirects to known malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains text related to organizational charts and the wkhtmltopdf generator, suggesting a lure. The PDF also contains a large number of embedded links, many pointing to Shopify domains, which is characteristic of SEO link farms used to distribute 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=organizational+chart+with+responsibilities+template+doc
    • http://files.theperfectpairdolphintrilogy.com/uploads/1/3/0/9/130969498/kuromelokimut-kukiwikuro-kozisubizesujer-zuseguf.pdf
    • http://files.elyzadiamonds.com/uploads/1/3/0/8/130813694/kidefexu.pdf
    • http://files.michelsacademy.com/uploads/1/3/2/7/132712315/67b8578.pdf
    • https://cdn.shopify.com/s/files/1/0434/7474/7558/files/juxewiwunejufakepisulivaj.pdf
    • https://cdn.shopify.com/s/files/1/0432/1184/9892/files/dnd_5e_monster_list.pdf
    • https://cdn.shopify.com/s/files/1/0429/9636/7511/files/wadaragidapurekasirewi.pdf
    • https://cdn.shopify.com/s/files/1/0440/6856/9238/files/water_bottle_labels_template_free.pdf
    • https://cdn.shopify.com/s/files/1/0437/6687/4266/files/67731484524.pdf
    • https://cdn.shopify.com/s/files/1/0432/9901/2763/files/40893718894.pdf
    • https://cdn.shopify.com/s/files/1/0441/3430/1848/files/rsum_la_chute_albert_camus.pdf
    • https://cdn.shopify.com/s/files/1/0434/1035/8439/files/kisegamisarona.pdf
    • https://cdn.shopify.com/s/files/1/0432/1653/5720/files/58195696369.pdf
    • https://cdn.shopify.com/s/files/1/0438/2598/7746/files/geramedowaxefulivutonuk.pdf
    • https://cdn.shopify.com/s/files/1/0438/4748/3557/files/ruwimixomata.pdf
    • https://cdn.shopify.com/s/files/1/0430/1540/5725/files/9952205083.pdf
    • https://cdn.shopify.com/s/files/1/0439/4532/8808/files/foxuvanededazunoseva.pdf
    • https://cdn.shopify.com/s/files/1/0429/6255/0940/files/51878922872.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_off00005f60.bin
e7c7b6c12e96e59087a7fb6d2a3ff7569196a0ba06800fd124cd65544a353b4a
pdf-font-stream PDF embedded font (sfnt) at offset 0x5F60 5796 bytes
font_01_sfnt_off000072fb.bin
411a406b4d0ee16cdcc4343f0292958e6fd99ee77fcffdbacc1160f3a6bdd035
pdf-font-stream PDF embedded font (sfnt) at offset 0x72FB 9696 bytes