PDF malware analysis — malicious · 669e3e7d08ee0c9c

MALICIOUS

PDF

45.3 KB Created: 2020-08-31 00:03:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 489f514b5965373f86a2d870f0b8c828 SHA-1: c1653e70f5f5de124a73a8c2a6fde400b3f80d88 SHA-256: 669e3e7d08ee0c9ca89f5b9a374fb4a047a9050ba3789582cf27ed88913dbe74

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.ru/wix?keyword=icd+10+paronychia'. This URL is likely intended to lead the user to a malicious site, potentially for phishing or malware distribution. The presence of numerous other PDF links, identified as a link farm, further supports the malicious intent of this document.

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.ru/wix?keyword=icd+10+paronychia
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- https://static.usrfiles.com/ugd/87a178_5006b80ec07f4c4193de36920ff76569.pdf
- https://static.usrfiles.com/ugd/b8c837_03cd2da1f9fc42399650b944f5b7e15d.pdf
- https://static.usrfiles.com/ugd/b8c837_83ce04e5ef8f43b7a9bf100015f2daa1.pdf
- https://cdn.shopify.com/s/files/1/0431/4018/6268/files/bhagavad_gita_book_in_kannada.pdf
- https://cdn.shopify.com/s/files/1/0436/7279/7337/files/calendrier_2020_octobre.pdf
- https://cdn.shopify.com/s/files/1/0437/5071/9642/files/eilifsen_auditing_and_assurance_services.pdf
- https://cdn.shopify.com/s/files/1/0434/8408/6424/files/kujudajige.pdf
- https://cdn.shopify.com/s/files/1/0436/1525/6738/files/seguzifadibidi.pdf
- https://cdn.shopify.com/s/files/1/0448/9995/8939/files/android_p_vs_ios_11.pdf
- https://cdn.shopify.com/s/files/1/0430/6056/0025/files/62093667570.pdf
- https://cdn.shopify.com/s/files/1/0433/0668/0484/files/rotelamanavora.pdf
- https://cdn.shopify.com/s/files/1/0429/2889/8211/files/polaris_rzr_800_service_manual.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_off00006a37.bin` `45bac811260da89a59b235be1410e9539cbb6c17d71665b7a8a75abd6b5a64dd`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6A37	5184 bytes
`font_01_sfnt_off00007bcf.bin` `084b95fdbe40b2ac4a0a38ea7fcb2d6b3ede8393c52ae12aa97a64a42fea5038`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7BCF	14664 bytes

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