PDF malware analysis — malicious · 6b4b7fb6a7f63903

MALICIOUS

PDF

55.5 KB Created: 2020-09-02 00:50:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: a6a1b5682dfd6ec26ec6472434d5cf04 SHA-1: b8004ed2aa0db6ff3f54832f624981bb10bffb22 SHA-256: 6b4b7fb6a7f63903a9fd54d31b55da424fbcb28a79bd7762159f5049b6df1130

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded links, masquerading as a race report, to a redirector service (ttraff.com) which is flagged as malicious. This suggests the document is designed to trick users into clicking through to potentially harmful content. The ML classifier also strongly indicated maliciousness.

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=ironman+lake+placid+70.+3+race+report
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- https://cdn.shopify.com/s/files/1/0433/8830/5575/files/candy_camera_sticker_pack_1.pdf
- https://cdn.shopify.com/s/files/1/0438/2723/2918/files/fomaxexunaganilos.pdf
- https://cdn.shopify.com/s/files/1/0437/1644/4315/files/17867795326.pdf
- https://cdn.shopify.com/s/files/1/0434/4807/4405/files/47727176603.pdf
- https://cdn.shopify.com/s/files/1/0428/9835/8432/files/37237973095.pdf
- https://static.usrfiles.com/ugd/b8c837_be43e3f1c62e4d03850889c24c0edb5f.pdf
- https://static.usrfiles.com/ugd/73f3b0_540abc0e05f3473c843493c6aa07f357.pdf
- https://static.usrfiles.com/ugd/45e30f_6016794bca154f8692898bb99d37402d.pdf
- https://static.usrfiles.com/ugd/3de8a6_be0936ec4d554404aee81a4e4d39a5df.pdf
- https://static.usrfiles.com/ugd/11f207_f8eeef2b60a543ffa5170c9b6c01ad41.pdf
- https://cdn.shopify.com/s/files/1/0435/2363/7402/files/71728487956.pdf
- https://cdn.shopify.com/s/files/1/0431/8006/4936/files/forex_tester_3_crack.pdf
- https://cdn.shopify.com/s/files/1/0437/9282/6517/files/97908719210.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/
- http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off00009b99.bin` `6bb4c63d1d327c9d0ef1c9e5b12fd7e9d95f7ddec0a8957686c049566b48eb1b`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x9B99	5460 bytes
`font_01_sfnt_off0000ae1d.bin` `f4fa43c3d5d613f18cd886279fa18f665e3973e086321c5b3c0f0bc46c23475d`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xAE1D	10404 bytes

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