Malicious PDF — malware analysis report

Static analysis result for SHA-256 de925e52320dfc8b…

MALICIOUS

PDF

43.0 KB Created: 2020-08-01 00:51:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 053ca89541bcb6c89bcbde37a8266a63 SHA-1: ac24299ed3002adae105afaacbe9cfd350d29d8e SHA-256: de925e52320dfc8b772e3c3a91d83a162c0c7c51b2f9a456905b77ba19ce301e
150 Risk Score

Malware Insights

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

The PDF file was flagged by multiple critical heuristics for containing a malicious redirector link and a large number of external PDF links, suggesting a link farm for SEO manipulation or malware distribution. The primary malicious URL identified is https://ttraff.cc/pify?keyword=replace+multiple+value+python, which is likely used to redirect users to a malicious site. 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=replace+multiple+value+python
    • http://files.abcrgr.org/uploads/1/3/1/3/131380158/wazotaxufa-mirabotunenal-gepowu.pdf
    • http://files.flcglasgow.org/uploads/1/3/1/4/131407080/nowasawonor-bedopizigutuxo-solifowi.pdf
    • http://files.lbkkennel.com/uploads/1/3/0/8/130813536/tokuwipezijawik.pdf
    • http://files.rootptandwellness.org/uploads/1/3/1/8/131856076/lesabafufazogeziz.pdf
    • https://cdn.shopify.com/s/files/1/0429/2296/7207/files/62748846850.pdf
    • https://cdn.shopify.com/s/files/1/0435/8035/8815/files/nopivapoxamuzugab.pdf
    • https://cdn.shopify.com/s/files/1/0429/4190/7100/files/14014957822.pdf
    • https://cdn.shopify.com/s/files/1/0433/6808/7701/files/pathfinder_locate_object.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/50751207741.pdf
    • https://cdn.shopify.com/s/files/1/0427/9900/5863/files/namexoniwagetidijujo.pdf
    • https://cdn.shopify.com/s/files/1/0430/8199/0295/files/19258023883.pdf
    • https://cdn.shopify.com/s/files/1/0428/1230/9670/files/jebotetusumotasekitadof.pdf
    • https://cdn.shopify.com/s/files/1/0429/9263/1962/files/devetoroxem.pdf
    • https://cdn.shopify.com/s/files/1/0428/7974/6201/files/todewaluxazufagaxa.pdf
    • https://cdn.shopify.com/s/files/1/0433/1424/9886/files/36456616628.pdf
    • https://cdn.shopify.com/s/files/1/0431/3900/6615/files/zokizezudisizuzo.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_off000069d3.bin
a1a01463a49608a7f38b3fcbe646983fa7698fb05fe2f79a602445ee6bfa3435		 pdf-font-stream PDF embedded font (sfnt) at offset 0x69D3 5068 bytes
font_01_sfnt_off00007b01.bin
849a449feac23850eec6918a2bf8c04836682cc02d519c2957c66566346eb021		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7B01 10568 bytes

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