PDF malware analysis — malicious · 242668f38e7ca041

MALICIOUS

PDF

44.0 KB Created: 2020-07-27 04:33:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 01e28be207db8c6bbdba56c5d5a05ff0 SHA-1: a1763c964ecd63c553e9533e61461c71d901087e SHA-256: 242668f38e7ca041a828ae5a4c633016ac2c14cf3408d21c6d5652b0bd0659bf

150 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a malicious redirector link disguised as a cost accounting standards guide. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK indicates that the embedded URL leads to known malicious infrastructure. Additionally, PDF_SEO_LINK_FARM suggests the document is part of a link farm, likely for SEO manipulation or to host further malicious content. The ML classifier strongly supports the malicious nature of this PDF.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 3

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.
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=cch+cost+accounting+standards+guide
- http://files.lmc-photo.com/uploads/1/3/1/4/131454126/e61fe6d.pdf
- http://files.vintagegypsysoul.com/uploads/1/3/1/8/131858045/7865797.pdf
- http://files.breezypointdermatology.com/uploads/1/3/1/4/131406806/8690636.pdf
- http://files.travelreiters.com/uploads/1/3/2/7/132740619/jaxigojiwoliwos.pdf
- http://files.travelreiters.com/uploads/1/3/2/7/132740619/jaxigojiwoliwo
- https://cdn.shopify.com/s/files/1/0429/2729/2582/files/titozibumovepoketewigiram.pdf
- https://cdn.shopify.com/s/files/1/0429/3437/0470/files/16248631208.pdf
- https://cdn.shopify.com/s/files/1/0431/8828/9694/files/lomavafuben.pdf
- https://cdn.shopify.com/s/files/1/0431/4464/2715/files/77995881727.pdf
- https://cdn.shopify.com/s/files/1/0431/6620/4066/files/sotovag.pdf
- https://cdn.shopify.com/s/files/1/0428/9835/8432/files/76102764406.pdf
- https://cdn.shopify.com/s/files/1/0429/9541/7237/files/22859888540.pdf
- https://cdn.shopify.com/s/files/1/0431/6758/0322/files/viworovulerunabiwisabegaj.pdf
- https://cdn.shopify.com/s/files/1/0435/4460/8920/files/72191153061.pdf
- https://cdn.shopify.com/s/files/1/0431/9048/5150/files/39264263625.pdf
- https://cdn.shopify.com/s/files/1/0431/4185/7448/files/92745594302.pdf
- https://cdn.shopify.com/s/files/1/0435/6653/0728/files/28565937403.pdf
- https://cdn.shopify.com/s/files/1/0431/3631/9645/files/kamatinuxijanewu.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off00007051.bin` `b874971e84de888bae6ab265c5d1206aafd2d346d7a3f31db9c506bac88b2269`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7051	5076 bytes
`font_01_sfnt_off0000817a.bin` `ad4be5be913620c667e3849276a881b7245c57684ed120ba58e8f89726b90527`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x817A	9704 bytes

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