Malicious PDF — malware analysis report

Static analysis result for SHA-256 89646eea49c3be90…

MALICIOUS

PDF

42.3 KB Created: 2020-08-14 02:10:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 56147cf499b97cfd57d49d6ea69631fd SHA-1: 56790cff3dc5307f395883cf89eeec4a56c60027 SHA-256: 89646eea49c3be90f9d77f9e16fc5a9462e07b1ba34541dc2c2e7983a7cd1353
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to Shopify domains hosting other PDFs, suggesting a link farm or SEO poisoning tactic. One critical heuristic identified a link to a known malicious redirector, ttraff.cc, which is likely the primary malicious payload delivery mechanism. The document body contains garbled text but includes the URL for the redirector and a benign-looking PDF.

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=easy+guitar+songs+sheets
    • http://files.silverliningdesigns.co/uploads/1/3/0/7/130776749/giwiwixukup.pdf
    • http://files.benbrookbobcatband.com/uploads/1/3/2/6/132696263/6240448.pdf
    • http://files.cuauhtemocmurphy.com/uploads/1/3/2/6/132682808/xebagozar-xinawimijad.pdf
    • http://vazar.puresculptbeauty.com/uploads/1/3/1/4/131453150/mebik.pdf
    • https://cdn.shopify.com/s/files/1/0430/9870/1977/files/dososide.pdf
    • https://cdn.shopify.com/s/files/1/0440/5736/2597/files/math_behind_machine_learning.pdf
    • https://cdn.shopify.com/s/files/1/0448/3461/9549/files/minecraft_medieval_roleplay_server.pdf
    • https://cdn.shopify.com/s/files/1/0433/9322/0758/files/44755232875.pdf
    • https://cdn.shopify.com/s/files/1/0429/3787/6639/files/bunny_ears_template_free.pdf
    • https://cdn.shopify.com/s/files/1/0430/7451/9194/files/xinimunawovuxumopo.pdf
    • https://cdn.shopify.com/s/files/1/0431/1420/1250/files/baixar_acrobat_reader_portugues.pdf
    • https://cdn.shopify.com/s/files/1/0438/7300/9819/files/fulejobaginubowisorovusa.pdf
    • https://cdn.shopify.com/s/files/1/0436/3943/9510/files/wopurenetese.pdf
    • https://cdn.shopify.com/s/files/1/0440/5772/3030/files/aulularia_plauto.pdf
    • https://cdn.shopify.com/s/files/1/0431/3769/5906/files/gree_portable_air_conditioner_manual.pdf
    • https://cdn.shopify.com/s/files/1/0432/3603/2674/files/40636677114.pdf
    • https://cdn.shopify.com/s/files/1/0429/4325/0588/files/22021568852.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_off000069a8.bin
3ddf739c91497eb34546d20566a4553ca80e1797ccc02ed9d48328acf62d22ea		 pdf-font-stream PDF embedded font (sfnt) at offset 0x69A8 4976 bytes
font_01_sfnt_off00007a92.bin
ab5028b9eac50ec5dc9988c4637b56f2eabcd49a49faa9cdf01e36957d97ca1e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A92 9880 bytes

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