Malicious PDF — malware analysis report

Static analysis result for SHA-256 fb7505a7bbbc6cea…

MALICIOUS

PDF

42.3 KB Created: 2020-08-20 13:47:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9ffe21ad0125bbada2d2aad3d9595fc0 SHA-1: 012761bc13be7eaa10e775165f1346768b2e9006 SHA-256: fb7505a7bbbc6cea3a685dbe0d7e5470d58e59903431c29e7ff2c2edf6188c6c
150 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. The document body, though heavily obfuscated, also contains this URL, suggesting it's the primary lure. The file also exhibits characteristics of a link farm, with numerous embedded URLs, many hosted on 'cdn.shopify.com', which are likely used to obscure the malicious redirector. The ML classifier strongly supports the malicious verdict.

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.com/pify?keyword=anaconda+full+movie++mp4
    • http://pavilip.swiftchatapp.com/uploads/1/3/0/8/130813042/2342e.pdf
    • http://files.orioleadvocates.org/uploads/1/3/1/4/131406799/bosonasedo.pdf
    • http://files.macmccuskerceramics.com/uploads/1/3/1/3/131398515/votijekamova.pdf
    • http://files.zencoffeecompany.com/uploads/1/3/2/6/132681463/d793bcf4e2.pdf
    • https://cdn.shopify.com/s/files/1/0429/8525/9159/files/35031129159.pdf
    • https://cdn.shopify.com/s/files/1/0431/7986/8309/files/kamobi.pdf
    • https://cdn.shopify.com/s/files/1/0431/0705/7825/files/kerobuxetupuratozixomus.pdf
    • https://cdn.shopify.com/s/files/1/0431/7826/2689/files/rumapuluves.pdf
    • https://cdn.shopify.com/s/files/1/0436/5228/4566/files/peropijavidivijavosakopu.pdf
    • https://cdn.shopify.com/s/files/1/0429/6353/3977/files/dapiripev.pdf
    • https://cdn.shopify.com/s/files/1/0431/4995/1138/files/43259883416.pdf
    • https://cdn.shopify.com/s/files/1/0432/9901/2766/files/53657252745.pdf
    • https://cdn.shopify.com/s/files/1/0432/8767/5036/files/baruregodujupu.pdf
    • https://cdn.shopify.com/s/files/1/0432/2073/0020/files/23450568989.pdf
    • https://cdn.shopify.com/s/files/1/0431/0515/7282/files/cub_cadet_ltx_1045.pdf
    • https://cdn.shopify.com/s/files/1/0432/0319/9136/files/dumilomovitokunabenagiti.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_off00004831.bin
f08e718d308ee1f7220eafc885832da6a366f444359a46543aa4d5c62400db4f
pdf-font-stream PDF embedded font (sfnt) at offset 0x4831 5164 bytes
font_01_sfnt_off000059b4.bin
50111c0302d187121595f877d33b842521db8f1881fa1a7df2ebf5fc752328c5
pdf-font-stream PDF embedded font (sfnt) at offset 0x59B4 10156 bytes
font_02_sfnt_off00007cbd.bin
9e8409b995ac2b0bb76eb3eb8dd1c90fa55d1c1c8a40bb5daa08ca4080948d13
pdf-font-stream PDF embedded font (sfnt) at offset 0x7CBD 18776 bytes