Malicious PDF — malware analysis report

Static analysis result for SHA-256 dfa99e44962fd115…

MALICIOUS

PDF

48.4 KB Created: 2020-08-15 07:29:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 017c6293b454c938d54ad2b5f2732de0 SHA-1: 3d9b872f1f6953d0037cbc973a5d6d123177871e SHA-256: dfa99e44962fd115634133832e65e47b3db988e4bf8c1cca9bc2e7e17b114d3b
150 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 Shopify domains hosting other PDFs, creating a link farm. One critical heuristic identified a link to a known malicious redirector, ttraff.cc, which is likely used to obscure the final malicious destination. The document body, though heavily obfuscated, contains the URL that triggered the redirector heuristic, suggesting the document's primary purpose is to drive traffic to malicious infrastructure.

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=fusiform+dilatation+ascending+thoracic+aorta
    • http://files.polished-professionals.com/uploads/1/3/1/4/131437318/b10a580f19ebe1.pdf
    • http://files.stpaulcaledonia.org/uploads/1/3/2/6/132681558/e9cec62c77c374a.pdf
    • http://dafuzuri.rootsphillyyoga.com/uploads/1/3/1/6/131637814/dopevajorit_dodureseb.pdf
    • http://files.jerrygarciafoundation.net/uploads/1/3/0/8/130874580/8167665.pdf
    • https://cdn.shopif
    • https://cdn.shopify.com/s/files/1/0433/4875/4600/files/kizam.pdf
    • https://cdn.shopify.com/s/files/1/0430/0714/8185/files/abdomen_agudo_gpc.pdf
    • https://cdn.shopify.com/s/files/1/0431/7783/6702/files/92766869401.pdf
    • https://cdn.shopify.com/s/files/1/0431/8032/7076/files/24927445374.pdf
    • https://cdn.shopify.com/s/files/1/0430/3526/3138/files/anamnesis_formato.pdf
    • https://cdn.shopify.com/s/files/1/0430/6855/5415/files/77503356031.pdf
    • https://cdn.shopify.com/s/files/1/0454/0589/6872/files/water_logging_and_salinity_in_pakistan.pdf
    • https://cdn.shopify.com/s/files/1/0429/2545/7574/files/essential_hematology_download.pdf
    • https://cdn.shopify.com/s/files/1/0435/3631/8616/files/sada_baby_bartier_bounty_zip.pdf
    • https://cdn.shopify.com/s/files/1/0429/1392/3228/files/breviarium_romanum_diurnale.pdf
    • https://cdn.shopify.com/s/files/1/0427/9474/6023/files/liwijodufufomizi.pdf
    • https://cdn.shopify.com/s/files/1/0432/1512/6685/files/wireshark_for_security_professionals.pdf
    • https://cdn.shopify.com/s/files/1/0433/4842/6902/files/baripoxipo.pdf
    • https://cdn.shopify.com/s/files/1/0440/3753/7942/files/jojexuwuvupilujunapi.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007255.bin
f8edebe187457a23a9af8fc74bec705e4a238e3afb53c1acd54ec259470ccb42
pdf-font-stream PDF embedded font (sfnt) at offset 0x7255 5272 bytes
font_01_sfnt_off00008409.bin
8d7a62a99e4cffd6f4a029dc199af35618973f6ca393305248c1e79f51618083
pdf-font-stream PDF embedded font (sfnt) at offset 0x8409 10060 bytes
font_02_sfnt_off0000a65b.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2
pdf-font-stream PDF embedded font (sfnt) at offset 0xA65B 4324 bytes