Malicious PDF — malware analysis report

Static analysis result for SHA-256 b028c291414cfde3…

MALICIOUS

PDF

38.5 KB Created: 2020-07-10 18:47:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4a46586e1a3c79c553b6d6b6ce3089de SHA-1: 9f64ab68695cbc7d33a3069eb29376df60c7dc46 SHA-256: b028c291414cfde325af639ed4388b5919f6c68282246be622ce5ff594fc2e50
128 Risk Score

Malware Insights

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

The PDF contains a lure related to flattening PDFs in Acrobat Pro, but the embedded links point to a malicious redirector and a large number of external PDF links, indicating a link farm or redirection campaign. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' confirms redirection to known malicious infrastructure, and 'PDF_SEO_LINK_FARM' indicates a mass of external links. No scripts were extracted from this sample.

Heuristics 4

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/wb?keyword=how%20to%20flatten%20a%20pdf%20in%20acrobat%20pro%2011
    • http://files.lacuralifestyle.com/uploads/1/3/1/3/131383661/e16bf5065cf.pdf
    • http://files.iwagy.org/uploads/1/3/1/4/131407281/rodibapipoxe_fojilejifetisi_kovorozunitoxa.pdf
    • http://files.professorwmoser.com/uploads/1/3/0/9/130969987/3437644.pdf
    • http://files.moabtramproject.org/uploads/1/3/1/1/131163838/e9e967b71aa.pdf
    • http://files.sherieunfiltered.com/uploads/1/3/2/8/132815961/a59b4b501cc8.pdf
    • http://files.eatslayrt.com/uploads/1/3/1/4/131453394/b30fe9b74.pdf
    • http://files.minigardenexpress.com/uploads/1/3/1/3/131379740/mojinolozodejovomew.pdf
    • http://files.southseattleoto.com/uploads/1/3/1/4/131454770/tadedopapezedur.pdf
    • https://timowasufu57836677.files.wordpress.com/2020/06/satasemoduxuti.pdf
    • https://dezulav.files.wordpress.com/2020/07/66873504258.pdf
    • https://folaredatar.files.wordpress.com/2020/06/fotob.pdf
    • https://lawikisuj.files.wordpress.com/2020/06/movagipo.pdf
    • https://jefukuvanowi.files.wordpress.com/2020/07/tuvub.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/76588695657.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/83583068491.pdf
    • https://cdn.shopify.com/s/files/1/0427/4513/5260/files/defurakutuwulijapovotuje.pdf
    • https://cdn.shopify.com/s/files/1/0430/4646/9793/files/79355476859.pdf
    • https://cdn.shopify.com/s/files/1/0432/8184/2341/files/risorisutomunewawudo.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/87967576867.pdf
    • https://cdn.shopify.com/s/files/1/0429/8981/3909/files/nivige.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_off000058da.bin
d2d0279a3d7f6c3769e2b8118094b74cd9fd3b59713d019129e21e255b756777
pdf-font-stream PDF embedded font (sfnt) at offset 0x58DA 5004 bytes
font_01_sfnt_off000069f3.bin
51081f8e8f10b7ab77d58e00a8327c1d2a0b721af19078954f687902445b42de
pdf-font-stream PDF embedded font (sfnt) at offset 0x69F3 10236 bytes