Malicious PDF — malware analysis report

Static analysis result for SHA-256 36b0818e70f9fe01…

MALICIOUS

PDF

32.6 KB Created: 2020-08-10 11:09:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 993339eadf0f54b28548054566d311b5 SHA-1: 81f1146d70edaaba97f6e61ca670e0ee232c77bd SHA-256: 36b0818e70f9fe019e6456ef9b1dbf91d5a8ea10df8c799bc4cbdfb5a1e24c50
150 Risk Score

Malware Insights

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

The PDF document contains a malicious redirector link disguised as a dialysis machine manual. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK indicates that the primary URL, https://ttraff.cc/pify?keyword=b+braun+dialysis+machine+manual+pdf, leads to known malicious infrastructure. Additionally, the PDF_SEO_LINK_FARM heuristic suggests a large number of outbound links, many hosted on Shopify, which is a common tactic for SEO poisoning and distributing malicious content. No scripts were extracted, but the presence of a malicious redirector is sufficient to classify the attack pattern.

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=b+braun+dialysis+machine+manual+pdf
    • http://memasixo.aussales.net/uploads/1/3/1/4/131453674/situsu_rilenomozogid.pdf
    • http://files.scrta.net/uploads/1/3/0/8/130813696/4892872.pdf
    • http://files.pegasusmodelclub.com/uploads/1/3/0/7/130775014/5563903.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/71062637782.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/nitupalakisotubawu.pdf
    • https://cdn.shopify.com/s/files/1/0430/9814/4932/files/xubexuker.pdf
    • https://cdn.shopify.com/s/files/1/0432/8049/8841/files/59351382383.pdf
    • https://cdn.shopify.com/s/files/1/0430/3595/1257/files/ditetosugojodagalozelerir.pdf
    • https://cdn.shopify.com/s/files/1/0433/8830/5558/files/1828247783.pdf
    • https://cdn.shopify.com/s/files/1/0429/2509/7126/files/15036612229.pdf
    • https://cdn.shopify.com/s/files/1/0431/1390/6327/files/11681741483.pdf
    • https://cdn.shopify.com/s/files/1/0435/8465/1423/files/bepuvo.pdf
    • https://cdn.shopify.com/s/files/1/0435/4143/0440/files/nasafudapodaxemexogozele.pdf
    • https://cdn.shopify.com/s/files/1/0431/7747/6260/files/96949583712.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_off0000441c.bin
1fbde5bbc4370cab1c889e40cdef3c1b295eac04fbddf7861e33068709148277		 pdf-font-stream PDF embedded font (sfnt) at offset 0x441C 5688 bytes
font_01_sfnt_off00005753.bin
13b81b799cb82ec92589af3cdb43a411f61adc303bc5697fb30504390ce5acb6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5753 8896 bytes

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