PDF malware analysis — malicious · 4dbc22bbd6b5acbc

MALICIOUS

PDF

55.6 KB Created: 2020-10-17 18:26:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20

MD5: fd05a408f23a26b3d7cdf2616fa739da SHA-1: c0e10102001594e5bce74d50b63c66b20d492c14 SHA-256: 4dbc22bbd6b5acbc12cd6f8e56ddafc9d00f1f6eecb83446165a94fb4ec0e79e

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains embedded links, one of which, 'https://ttraff.me/123?keyword=android+studio+hide+navigation+bar+permanently', is flagged as a malicious redirector. The document body, though heavily obfuscated, appears to contain text related to 'Android studio' and includes this malicious URL, suggesting a lure to a malicious site. The presence of numerous other PDF links also indicates a link farm, a common tactic for SEO poisoning or distributing malware.

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.me/123?keyword=android+studio+hide+navigation+bar+permanently In PDF document text
- https://cdn-cms.f-static.net/uploads/4366313/normal_5f8935c6dfd80.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4366005/normal_5f874fedcae79.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4366033/normal_5f8745deb2aa4.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4366003/normal_5f8755ed6fb2d.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- https://uploads.strikinglycdn.com/files/9332df7a-b7fc-4c8e-84a6-8a719f8bbda9/lojimuguzesul.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/68839ca5-5b69-4f55-8284-66ff3f33f9bb/92884397163.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/c1cf6f6c-681d-4ba1-9b22-a9c3a8f5828c/kepetuvudu.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/6e091216-f9e1-4d34-b7ec-fd83891da2bc/vesigigisasujeniruvogo.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/ec2bc1f8-43ea-4031-8acc-05546e130963/bidolikiki.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/73017570-d8c8-4bcc-9a50-8c3215e1e001/50_shades_of_darker_full_movie_in_hi.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/d5882217-ea36-44b4-ae29-377f5f97424f/zupagavasiwumuruvor.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/34924c3a-fa31-4197-a29f-5d8f003206dc/fumuwuge.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0493/7413/4438/files/vpn_tunnel_apk.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0503/7942/3942/files/50175948499.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0483/4502/2624/files/alphabet_poem_definition.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0486/1820/9438/files/stock_character_definition_english.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0432/6480/2982/files/sandisk_compact_flash_32gb.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0432/8584/0036/files/fonujiziwakikira.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0500/2615/2093/files/icse_class_11_computer_book.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0477/0001/7318/files/keeping_current_worksheet_answers.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0431/1223/5159/files/28791884385.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0499/9898/7414/files/electrotherapy_books_free.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0481/6633/8711/files/best_reloading_press_for_beginners.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off00006c8e.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6C8E	15016 bytes
SHA-256: `3e8cd92a35c643a93bd71e3ece129769add2d587f50e53831511fe202716d306`
`font_01_sfnt_off000099bb.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x99BB	5664 bytes
SHA-256: `4cb83cb0bafbbc01882fc93272faf117e5e91243915c8a2fca46d36d2c9abd86`
`font_02_sfnt_off0000acd8.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xACD8	10384 bytes
SHA-256: `ec06d7ffb45ec840724e6f01245f1559786b308a1a3f95e875ecb69a1a8b1966`

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