Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd89db19415d328f…

MALICIOUS

PDF

43.8 KB Created: 2020-08-08 13:44:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4d1d9ba2418ee7e9aa70fc559645cfd6 SHA-1: 7fac5a4da94f460817f6a571f73e6faa83d73ceb SHA-256: bd89db19415d328f5527b21264c896ed84347bb7e80badb18fe1fbe551482021
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a link farm designed to appear as legitimate exercise PDFs, but the primary link redirects to a malicious redirector. The embedded URL `https://ttraff.cc/pify?keyword=analise+combinatoria+exercicios+pdf` is a critical indicator of malicious intent, likely serving as a lure to a phishing or malware distribution site. The presence of numerous other PDF links, many hosted on Shopify, suggests a coordinated effort to manipulate search engine results or 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.cc/pify?keyword=analise+combinatoria+exercicios+pdf
    • http://files.nickcoulston.com/uploads/1/3/1/1/131163867/tibudipen_xazivodamajaf.pdf
    • http://files.merriemoore.com/uploads/1/3/0/7/130775607/2385496.pdf
    • http://files.yogashak.com/uploads/1/3/0/9/130969910/zevuru.pdf
    • http://files.pasaliphilippines.org/uploads/1/3/0/7/130739204/f0bcfd5aa.pdf
    • http://kerolewo.puerhbrooklyn.com/uploads/1/3/0/7/130776031/mefovuked.pdf
    • https://cdn.shopify.com/s/files/1/0430/1471/7597/files/79322692539.pdf
    • https://cdn.shopify.com/s/files/1/0432/1237/4174/files/gusazikigugojafer.pdf
    • https://cdn.shopify.com/s/files/1/0438/3696/5026/files/lima_zip_code.pdf
    • https://cdn.shopify.com/s/files/1/0431/0378/1013/files/36762498098.pdf
    • https://cdn.shopify.com/s/files/1/0432/6762/1028/files/tapiwibopovoviwuxowodu.pdf
    • https://cdn.shopify.com/s/files/1/0431/0378/1015/files/64254731713.pdf
    • https://cdn.shopify.com/s/files/1/0445/2987/7151/files/cefaclor_suspensao_bula.pdf
    • https://cdn.shopify.com/s/files/1/0435/8524/1245/files/vexoremazesurugu.pdf
    • https://cdn.shopify.com/s/files/1/0431/3278/0695/files/bless_the_lord_lyrics_and_chords.pdf
    • https://cdn.shopify.com/s/files/1/0430/6521/3089/files/79183199320.pdf
    • https://cdn.shopify.com/s/files/1/0437/3073/1173/files/bnficiaire_effectif_d_une_socit.pdf
    • https://cdn.shopify.com/s/files/1/0429/6625/3724/files/tuxutikorozeledunagedep.pdf
    • https://cdn.shopify.com/s/files/1/0434/0708/1622/files/22863881595.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_off00006d53.bin
de065496f49320f51abffabec7ed6e108c637b3ac4b8c09e2c1b656e6df7910d
pdf-font-stream PDF embedded font (sfnt) at offset 0x6D53 5496 bytes
font_01_sfnt_off00007fea.bin
b80d4df494861285220e2ded75bc3eb1f755dafb2fa0da4e89a831e08fbd5ce1
pdf-font-stream PDF embedded font (sfnt) at offset 0x7FEA 10060 bytes