Malicious PDF — malware analysis report

Static analysis result for SHA-256 a543238b86c4a7a0…

MALICIOUS

PDF

35.5 KB Created: 2020-09-22 01:42:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: aff75c4ae992cd84fcd0dda7f192a9f9 SHA-1: b924f7bffaa4c2545fd8fea0c535434f15ac587e SHA-256: a543238b86c4a7a0912d78b4781c4d48cfe0e91d8abea0e89a4abb86b6fb6da4
150 Risk Score

Malware Insights

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

This PDF file contains a link farm and a direct link to a known malicious redirector. The document body, though heavily obfuscated, contains the same redirector URL. The primary function appears to be directing users to malicious infrastructure via a deceptive link.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.club/wix?keyword=their+eyes+were+watching+god+setting+quizlet
    • https://bface112-cdfd-4702-b94e-517a0b081f86.filesusr.com/ugd/544e7e_c395588e61d24faf97cfbd3f578bd141.pdf?index=true
    • https://1229910e-beb7-47b7-b8f3-04001e162b9b.filesusr.com/ugd/d4da64_75220fe549d54feb9d31958c2636d784.pdf?index=true
    • https://b460eb70-af53-4a75-a824-d2c323a98b42.filesusr.com/ugd/bcc0e4_6b035b5b98cb4d7988174ab2a999f7b3.pdf?index=true
    • https://35df65ec-d697-4a29-ac79-6317ef919391.filesusr.com/ugd/73cb9e_d618c85025a54fec8143b765f752e46a.pdf?index=true
    • https://c505fe9e-1b5b-4ad4-83f9-285b4dea6e4f.filesusr.com/ugd/d9e9a0_5f6a0f02b3db47dca1749320e991d1fe.pdf?index=true
    • https://9f9f4ac4-6a81-4a94-8c90-b74dd365d5bf.filesusr.com/ugd/ca300b_76fdfa63b700403f9e5fc0d73c65168f.pdf?index=true
    • https://ffd8b3c2-469b-4e13-b435-e4eadbdd84b0.filesusr.com/ugd/d19ca0_380faa26889e4cbc8f62ac45705a66f6.pdf?index=true
    • https://399ab4f0-b35a-4479-9085-8c31bf5ad71d.filesusr.com/ugd/b48b60_577d35b5b569414ca0c66b0af664109c.pdf?index=true
    • https://dcf39d67-7511-4a34-81b2-fd36b781c2da.filesusr.com/ugd/1cc777_cfc039c139654439a45887b3c7b36393.pdf?index=true
    • https://89d89c4e-ba07-43da-865b-5f2d54673f09.filesusr.com/ugd/16879a_fa5cbfe7f14f4a5f9f93012eb7e7f136.pdf?index=true
    • https://abb5b2c9-a016-4b9c-a1b3-2174187b27f3.filesusr.com/ugd/17ce20_5e0d34ee2be547a3997d5fdff54e5af7.pdf?index=true
    • https://ceac31be-c2a2-4396-bd99-e6fd411e79f5.filesusr.com/ugd/135178_3c7dc09443c64c3c880fdf3e3e4a0b85.pdf?index=true
    • https://032a36ed-c095-4205-ba27-5092393e1368.filesusr.com/ugd/a2ebd8_e25f599a9df045e39402db383f87e668.pdf?index=true
    • https://cdn.shopify.com/s/files/1/0484/2445/2254/files/18513896258.pdf
    • https://cdn.shopify.com/s/files/1/0432/6624/4766/files/agenda_escolar_mandalas_2020.pdf
    • https://cdn.shopify.com/s/files/1/0481/2256/0675/files/way_of_the_samurai_ps2.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_off00004d0a.bin
bf05841e0a5dedeb890d3e1ef81102d46f09e26828dda61668dac0a3cd905f8e
pdf-font-stream PDF embedded font (sfnt) at offset 0x4D0A 5520 bytes
font_01_sfnt_off00005fd8.bin
d1db38d87170980208b772f465da54013fa105b5a72c3309b0777cf7a0e30f85
pdf-font-stream PDF embedded font (sfnt) at offset 0x5FD8 9676 bytes