PDF malware analysis — malicious · 638c296b2896c9b9

MALICIOUS

PDF

45.9 KB Created: 2020-10-28 08:49:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14

MD5: 3cf7cae45932cda476126e8162676775 SHA-1: 3ca4679b6ce70cdb21badd0d0f4a7fa068f1d89f SHA-256: 638c296b2896c9b997a7edf7f30d84a164dfbd7b96d61dbf50ef015907303ff6

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous external links, including a critical redirector link to 'ttraff.cc', suggesting a link farm or phishing lure. The ML classifier also strongly flagged this PDF as malicious. While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the heuristics indicate the document is designed to redirect the user to malicious infrastructure, likely for further exploitation or credential harvesting.

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.cc/123?keyword=fujitsu+mini+split+installation+manual In PDF document text
- https://cdn-cms.f-static.net/uploads/4378855/normal_5f8ab82e8f6ed.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4376096/normal_5f980324cdc2a.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4388158/normal_5f90d9629e8b4.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4368997/normal_5f958ca77527f.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4379029/normal_5f91271c116c6.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4378164/normal_5f8ecf638e1e9.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4383314/normal_5f8eae255190c.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4369781/normal_5f98f2c2a5bcf.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- https://cdn.shopify.com/s/files/1/0505/6066/3746/files/efta_surveillance_authority_state_aid_guidelines.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0496/8978/8572/files/wenirelavelanux.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0484/4784/8602/files/79947939474.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0497/4120/1562/files/adjective_clause_examples_with_answers.pdfIn PDF document text
- https://s3.amazonaws.com/tedowafomaru/korean_reading_books_for_beginners.pdfIn PDF document text
- https://s3.amazonaws.com/mijedusovineti/bojelagodunorodu.pdfIn PDF document text
- https://s3.amazonaws.com/xanebavifamopez/31310037391.pdfIn PDF document text
- https://s3.amazonaws.com/wonoti/tafubo.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0437/8827/1767/files/ice_caps_climate_change.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0497/2196/6744/files/the_cats_of_ulthar_analysis.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0484/5846/5430/files/11572928593.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0502/6398/2233/files/companeros_1_chomikuj.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0457/7551/9910/files/83556311284.pdfIn PDF document text
- http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
- http://purl.org/dc/elements/1.1/In PDF document text
- http://ns.adobe.com/pdf/1.3/In PDF document text
- http://ns.adobe.com/xap/1.0/In PDF document text
- http://ns.adobe.com/xap/1.0/mm/In PDF document text
- http://ns.adobe.com/xap/1.0/rights/In PDF document text
- http://scripts.sil.org/OFLIn PDF document text
- http://dejavu.sourceforge.netIn PDF document text
- http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off00004d0e.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x4D0E	3772 bytes
SHA-256: `f79dfe7e8b68034e7796a524727b952cc737c2e4cccd6cbb182363b0a9818e06`
`font_01_sfnt_off00005a67.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x5A67	4900 bytes
SHA-256: `0f61459ecd4027fdb52c06a2304d98c03e87046b10fcb626af69f83b5b460736`
`font_02_sfnt_off00006af9.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6AF9	9732 bytes
SHA-256: `bf9db7b9ed290bc2636062f01cda46b63c525258cb08586a9f2f6526c13d3756`
`font_03_sfnt_off00008c88.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8C88	17936 bytes
SHA-256: `23a2247b141f95ed6584525e111fc220f67bce1923991f29393e670f07e17bbe`

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