Malicious PDF — malware analysis report

Static analysis result for SHA-256 5a0fa5f882cc69d6…

MALICIOUS

PDF

47.2 KB Created: 2020-08-08 06:20:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9e5a59add618d96c9d0ff25cae5132fb SHA-1: aa7cacdb95c20e15280919fee2538731e38e81ff SHA-256: 5a0fa5f882cc69d639223cef2ea48e91bbf8f008cb1676625258ace73944a54e
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a link farm hosted on cdn.shopify.com. One of these links, https://ttraff.cc/pify?keyword=electrolysis+chemistry+igcse+pdf, is identified as a malicious redirector. The document body, though heavily obfuscated, contains the same URL, suggesting the primary intent is to redirect users to malicious content. The ML classifier also strongly indicated maliciousness.

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=electrolysis+chemistry+igcse+pdf
    • http://files.ramonaorganfineart.com/uploads/1/3/0/7/130738771/lokepetemonuzima.pdf
    • http://files.eaglendt.services/uploads/1/3/2/6/132681501/puwovujabetejo.pdf
    • http://files.jackandfriendscentre.com/uploads/1/3/2/6/132681863/8066aec0a3b1756.pdf
    • http://files.christinefoghmusic.com/uploads/1/3/1/4/131437242/3504456.pdf
    • http://files.southsolonmeetinghouse.org/uploads/1/3/0/7/130738524/3890988.pdf
    • https://cdn.shopify.com/s/files/1/0430/2353/2195/files/14600152095.pdf
    • https://cdn.shopify.com/s/files/1/0429/2568/6951/files/87902361453.pdf
    • https://cdn.shopify.com/s/files/1/0437/8371/7015/files/55890733225.pdf
    • https://cdn.shopify.com/s/files/1/0429/6392/7206/files/32697275850.pdf
    • https://cdn.shopify.com/s/files/1/0431/0866/3456/files/28446660637.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/45366335679.pdf
    • https://cdn.shopify.com/s/files/1/0433/4046/4281/files/capitalism_nature_socialism.pdf
    • https://cdn.shopify.com/s/files/1/0434/6180/4197/files/32777738883.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/xixuvedivikeror.pdf
    • https://cdn.shopify.com/s/files/1/0435/7311/7087/files/73074884094.pdf
    • https://cdn.shopify.com/s/files/1/0436/2957/6352/files/xogezonigigowibujoxivufik.pdf
    • https://cdn.shopify.com/s/files/1/0435/5656/9249/files/auditing_assurance_standards_icai.pdf
    • https://cdn.shopify.com/s/files/1/0432/1925/5454/files/88627922402.pdf
    • https://cdn.shopify.com/s/files/1/0433/3892/4181/files/fupugib.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_off00006dc5.bin
58f5d67db93a8d74ddb3a126c35703ffdf6de945988ec560e5b46cb735c83923		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6DC5 5100 bytes
font_01_sfnt_off00007f28.bin
a05f5ca1e6a969ce1b957016918d5f10b5fbeb0ccf2dd644031aae3852f4102c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7F28 9948 bytes
font_02_sfnt_off0000a114.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA114 4324 bytes

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