Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ec47db31dbac2a4…

MALICIOUS

PDF

41.5 KB Created: 2020-08-11 05:51:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 047adc0af45d0ca66fbb7530841749a6 SHA-1: cb7fd2538645955094c462fcaa71b1094868d881 SHA-256: 1ec47db31dbac2a43ac4cf8ddc56c4522a47b01fe051e153a063178866f38d71
150 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to a link farm hosted on Shopify. One of these links, 'https://ttraff.cc/pify?keyword=encephalite+a+vih+pdf', is identified as a malicious redirector. The document body contains garbled text but includes the malicious URL, suggesting the document's primary purpose is to direct users to this malicious site. No scripts were extracted, but the heuristic firings strongly indicate a malicious redirection attempt.

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.cc/pify?keyword=encephalite+a+vih+pdf
    • http://fuzawifa.smallpawsbiglove.com/uploads/1/3/1/4/131438397/cfbac66e75.pdf
    • http://jetajide.rogeradamsmastertrainer.com/uploads/1/3/1/6/131607062/6238330.pdf
    • http://pajabe.medinacares.org/uploads/1/3/2/7/132740494/labegeritixo-xademirili-tumokipevuroz.pdf
    • http://files.teacher-on-the-road.com/uploads/1/3/0/9/130969404/1165df7ba7685ba.pdf
    • http://files.rattlesnakesafe.com/uploads/1/3/2/6/132682040/f3dcb.pdf
    • https://cdn.shopify.com/s/files/1/0429/4357/8278/files/channels_of_communication_in_an_organization.pdf
    • https://cdn.shopify.com/s/files/1/0436/1040/7069/files/lebodijavi.pdf
    • https://cdn.shopify.com/s/files/1/0431/0899/1125/files/jivorokaxigusulugina.pdf
    • https://cdn.shopify.com/s/files/1/0437/6385/9617/files/bharti_axa_car_insurance_policy_download.pdf
    • https://cdn.shopify.com/s/files/1/0430/2379/4337/files/5343926801.pdf
    • https://cdn.shopify.com/s/files/1/0431/8255/5297/files/26587366249.pdf
    • https://cdn.shopify.com/s/files/1/0431/6574/5309/files/91059396409.pdf
    • https://cdn.shopify.com/s/files/1/0436/2086/0064/files/86127876609.pdf
    • https://cdn.shopify.com/s/files/1/0430/8716/7645/files/agrochemicals_agrimoon.pdf
    • https://cdn.shopify.com/s/files/1/0433/5543/9263/files/schema_amplificateur_de_puissance_1000w.pdf
    • https://cdn.shopify.com/s/files/1/0430/8592/2466/files/gujoruworod.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_off000064f5.bin
3f3d30310d2e6213edf379ce519754a033c9ed0f8e014e56305bfdf19f089189
pdf-font-stream PDF embedded font (sfnt) at offset 0x64F5 4988 bytes
font_01_sfnt_off000075ea.bin
00f2a791e8eff7098c72cd884517b383772771d1ebb5cbbd77e6ecfa5524b697
pdf-font-stream PDF embedded font (sfnt) at offset 0x75EA 10368 bytes