Malicious PDF — malware analysis report

Static analysis result for SHA-256 b79f5341a753c57a…

MALICIOUS

PDF

54.6 KB Created: 2020-08-01 18:33:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e6040ba1653d6f6f11ce845ff43d7da1 SHA-1: 50cd7683d8bef37c521faee5b12cbb281051ebf1 SHA-256: b79f5341a753c57ade346ad3e1206ca94021a8bf39ccb32aa2e6c0ec2e6d855b
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.com/pify?keyword=e2%2525+80%2525+9cmonoline%2525+e2%2525+80%2525+9d+pen'. Additionally, it features a PDF link farm with numerous external PDF links, many hosted on cdn.shopify.com. This suggests a coordinated effort to lure users to malicious content, likely for phishing or malware distribution. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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=e2%2525+80%2525+9cmonoline%2525+e2%2525+80%2525+9d+pen
    • http://files.pdkmusic.com/uploads/1/3/2/8/132814674/8375061.pdf
    • http://files.talashop.net/uploads/1/3/1/4/131406817/dofamowaka-najav-pemixene-vebuba.pdf
    • http://files.vibrant-energies.com/uploads/1/3/0/8/130873907/nomadu.pdf
    • http://files.hokkaidoken.org/uploads/1/3/0/7/130775997/xizufidofaj.pdf
    • https://cdn.shopify.com/s/files/1/0440/6083/6005/files/36980203425.pdf
    • https://cdn.shopify.com/s/files/1/0434/0505/0008/files/70027925100.pdf
    • https://cdn.shopify.com/s/files/1/0432/2636/6111/files/dudejukafufofure.pdf
    • https://cdn.shopify.com/s/files/1/0429/1824/8601/files/62176949250.pdf
    • https://cdn.shopify.com/s/files/1/0437/1762/3957/files/67546169377.pdf
    • https://cdn.shopify.com/s/files/1/0430/6213/2897/files/3010915945.pdf
    • https://cdn.shopify.com/s/files/1/0429/4190/7100/files/totibazimasitaju.pdf
    • https://cdn.shopify.com/s/files/1/0431/7220/0608/files/53909820991.pdf
    • https://cdn.shopify.com/s/files/1/0429/8312/9251/files/94015373115.pdf
    • https://cdn.shopify.com/s/files/1/0430/8788/8535/files/nopejaxetemolobajon.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006cf0.bin
4767476a10be0d27eef88e88034338af38fc92a6c9f89d5a108e4cbb0c388dec		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6CF0 5552 bytes
font_01_sfnt_off00007fb1.bin
022c000c80aee52167ce0b4c02de3a5af5f323abf096e948971ad38864c40529		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7FB1 5460 bytes
font_02_sfnt_off000093d9.bin
4edd129c0a304bb40ba04d94ae42f915341bf0ad5123a58dc5d31cdc22ac8731		 pdf-font-stream PDF embedded font (sfnt) at offset 0x93D9 10380 bytes
font_03_sfnt_off0000b791.bin
d612c605d101522a7b082cd092ef78b209dae850c4a5e940dd0f53fb1bc5669f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB791 16148 bytes

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