PDF malware analysis — malicious · 5f51dfdf9e55ffe1

MALICIOUS

PDF

35.3 KB Created: 2020-08-16 17:51:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 2791b73ccc5f14571526dd7e6283b0db SHA-1: 647603dfe12910a6a9102b645c62acd4e92dc105 SHA-256: 5f51dfdf9e55ffe1504027caa689aa01119247f1431f9906b285b8c0de225fb8

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a critical heuristic firing for linking to known malicious redirector infrastructure, specifically pointing to 'ttraff.com'. The document body, though heavily obfuscated, contains a URL that appears to be a lure for a 'dna vs rna venn diagram worksheet'. This suggests a phishing or social engineering attack aiming to redirect the user to malicious content.

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=dna+vs+rna+venn+diagram+worksheet
- http://files.homesdomains.com/uploads/1/3/1/8/131871488/873ef.pdf
- http://mepizon.katherinesclassroom.com/uploads/1/3/0/7/130775436/fanogade.pdf
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- https://cdn.shopify.com/s/files/1/0429/9682/6273/files/freeswitch_developer_guide.pdf
- https://cdn.shopify.com/s/files/1/0431/0053/6986/files/15888257262.pdf
- https://cdn.shopify.com/s/files/1/0431/8131/0114/files/32787405758.pdf
- https://cdn.shopify.com/s/files/1/0432/2613/6731/files/12192893801.pdf
- https://cdn.shopify.com/s/files/1/0428/4681/4374/files/94_chevy_1500.pdf
- https://cdn.shopify.com/s/files/1/0435/9107/3947/files/lisezegosasuf.pdf
- https://cdn.shopify.com/s/files/1/0447/6056/3861/files/antrenmanlarla_geometri_2.pdf
- https://cdn.shopify.com/s/files/1/0431/4628/1120/files/9166448509.pdf
- https://cdn.shopify.com/s/files/1/0435/7724/5859/files/70929892564.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_off00004cf0.bin` `b867e1d61499d0fd048a2dea417a16fc9398f03363b6b047b4d62a262770ab80`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x4CF0	5424 bytes
`font_01_sfnt_off00005f4e.bin` `6629722dfe99a7705f7d7591f0b55dab86939cd07c501cf6b767dce3788cb005`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x5F4E	9800 bytes

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