Malicious PDF — malware analysis report

Static analysis result for SHA-256 402efa1b75fe040c…

MALICIOUS

PDF

44.2 KB Created: 2020-08-24 11:46:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ba98658ffa6c8b7b5d9ea04e6cb77912 SHA-1: 5c7279793719e200b71bdf8616f8bd2b2ec985f3 SHA-256: 402efa1b75fe040c1bc2dabb39f551d5228d15909ec3d1da2f3fd5bf34253231
150 Risk Score

Malware Insights

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

The PDF file contains a link that redirects to a malicious URL, identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though partially corrupted, suggests a lure related to a user manual. The PDF_SEO_LINK_FARM heuristic indicates a large number of external links, many hosted on cdn.shopify.com, which is a common tactic for SEO poisoning to drive traffic to malicious sites. The ML_NYX_PDF_MALICIOUS classifier strongly supports the malicious nature of the file.

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=ariston+aml85+washer+dryer+user+manual
    • http://poledele.milesformoms5k.org/uploads/1/3/1/4/131406686/nofewenewexozoxujini.pdf
    • https://cdn.shopify.com/s/files/1/0429/8201/5129/files/lozota.pdf
    • https://cdn.shopify.com/s/files/1/0441/1087/2728/files/hockerill_ofsted_report.pdf
    • https://cdn.shopify.com/s/files/1/0433/1523/2921/files/94197847489.pdf
    • https://cdn.shopify.com/s/files/1/0437/2417/7557/files/marerop.pdf
    • https://cdn.shopify.com/s/files/1/0431/7950/7870/files/amharic_english_parallel_bible.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/96626323422.pdf
    • https://cdn.shopify.com/s/files/1/0433/3531/9711/files/67844839228.pdf
    • https://cdn.shopify.com/s/files/1/0432/4212/7527/files/76389516455.pdf
    • https://cdn.shopify.com/s/files/1/0463/2962/6781/files/sekefitowepilokoremibadum.pdf
    • https://cdn.shopify.com/s/files/1/0433/3699/0885/files/34937632381.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_off00006e56.bin
74aa65f3f9b7666ce5605521bed8a416b4eba5e61bc10622c1a120a7933977b5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E56 5564 bytes
font_01_sfnt_off0000811e.bin
86bdaad55e33d0e5d6fad7360eb4bcd6bfb4937396c1cf8ab9123e4ebc839043		 pdf-font-stream PDF embedded font (sfnt) at offset 0x811E 10268 bytes

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