Malicious PDF — malware analysis report

Static analysis result for SHA-256 a40ac04670f7fac0…

MALICIOUS

PDF

45.0 KB Created: 2020-09-16 21:53:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 63e14ace7d5e358482788aee912fe079 SHA-1: 2c80ce497ed8841e554793f4f21e1dfdebce925b SHA-256: a40ac04670f7fac051c3d9001ceb7f13eb688edbe2fce6603600ccba775a1804
120 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 external PDF files, suggesting a link farm for SEO manipulation or to obscure malicious redirects. One critical heuristic identified a direct link to known malicious redirector infrastructure, specifically `https://ttraff.club/wix?keyword=gta+v+mobile+android+apk`, which is presented as a lure for a game download. The document body, though heavily obfuscated, contains this URL, reinforcing the phishing attempt. The presence of numerous other unknown URLs suggests a broader campaign.

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=gta+v+mobile+android+apk
    • http://files.sorianojose.com/uploads/1/3/0/7/130740012/kidilu.pdf
    • http://files.twocann.co.uk/uploads/1/3/0/7/130739621/xozubuvewife.pdf
    • http://dapopisen.kmcrisisministry.org/uploads/1/3/1/4/131438216/nurumo.pdf
    • http://xewexog.educationalpsychologisttherapy.com/uploads/1/3/0/8/130813364/9f0456e1a46d.pdf
    • http://files.lighthousekids.com/uploads/1/3/1/3/131379948/lukokixadufib.pdf
    • https://3a7df2eb-aa84-4c53-a89c-b70f4867cf0e.filesusr.com/ugd/bb05c1_4d66f509286848fba33f039e802b4fcd.pdf?index=true
    • https://3112051f-238a-48f2-95eb-a2c9de593400.filesusr.com/ugd/5c9621_a2c4fe8adaf740f9a438a4a6cf52e1a2.pdf?index=true
    • https://9b1c99cc-45f9-42de-9abc-cdebd94dfd6c.filesusr.com/ugd/03ae60_defd6915652d4281b92af3060f2463e2.pdf?index=true
    • https://a4c7aaa5-2229-441c-a4e0-26383a626555.filesusr.com/ugd/d31907_361928b6927c49c5a5a99d76bbbdf0d5.pdf?index=true
    • https://55f546c3-1608-4a7f-854d-da25d0f129e0.filesusr.com/ugd/8ff694_7514598774794115854e0e5e82eb8516.pdf?index=true
    • https://d5e62690-e798-4fed-9b85-350444892890.filesusr.com/ugd/3ed902_9da234fbab54422397cc751ae36fdc96.pdf?index=true
    • https://d85a5163-57ba-4a34-b922-a42e7f117b74.filesusr.com/ugd/0286dd_e5421a3c15a0482da842dd547f592266.pdf?index=true
    • https://ee54aae4-274c-48d2-ac6f-e4bc8ae69372.filesusr.com/ugd/9e41f0_d55cc347108847ae8f9d2b26fc59b274.pdf?index=true
    • https://2675014e-77fd-41c7-a3e5-e1732de00727.filesusr.com/ugd/d8966e_cdf2365d4c284238b6840e7de3fe44db.pdf?index=true
    • 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_off0000721c.bin
deddf057d8e83e0272f4c1f21889704d0e491a8a33d87006e90bb383e373de49
pdf-font-stream PDF embedded font (sfnt) at offset 0x721C 5220 bytes
font_01_sfnt_off000083cc.bin
0e52cafd2bd63b8ead36e3934bfd2d779e40e9059e01ce44db127d98768f7a54
pdf-font-stream PDF embedded font (sfnt) at offset 0x83CC 10424 bytes