PDF malware analysis — malicious · fd40dbfd6219adb8

MALICIOUS

PDF

43.9 KB Created: 2020-07-30 08:43:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 09132c1f38155b1568fa522b701ad8ee SHA-1: fd873e2fcbd9bf7195dbb3135811bc42e425dadf SHA-256: fd40dbfd6219adb8fcf9b56e1d0663d86b82891549e39026484b10573ce72426

152 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains multiple embedded links, with one specifically pointing to a known malicious redirector infrastructure at 'ttraff.ru'. This URL is disguised with keywords related to song chords, a common lure for SEO-based link farms. The ML classifier also strongly indicated maliciousness. The primary attack pattern involves luring users through seemingly innocuous content to malicious sites.

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/pify?keyword=adonai+hillsong+chords+pdf
- http://files.rockandrosh.com/uploads/1/3/2/6/132681690/9f76f9161194.pdf
- http://files.godsairforce.com/uploads/1/3/1/3/131398099/5585583.pdf
- http://files.ministryofunderwear.co.uk/uploads/1/3/0/8/130874477/4e6a74fc6d2.pdf
- https://cdn.shopify.com/s/files/1/0431/5794/6530/files/58746022506.pdf
- https://cdn.shopify.com/s/files/1/0432/3350/9534/files/60457854104.pdf
- https://cdn.shopify.com/s/files/1/0438/0003/5485/files/95037512601.pdf
- https://cdn.shopify.com/s/files/1/0433/0687/7080/files/kipisoluni.pdf
- https://cdn.shopify.com/s/files/1/0431/1590/5185/files/83398815263.pdf
- https://cdn.shopify.com/s/files/1/0430/8451/3440/files/banunapuviderezukusixozon.pdf
- https://cdn.shopify.com/s/files/1/0429/2342/5955/files/86292815952.pdf
- https://cdn.shopify.com/s/files/1/0429/3260/0985/files/robevigenuxugugezovu.pdf
- https://cdn.shopify.com/s/files/1/0429/2735/8115/files/futexidodinivuxafexej.pdf
- https://cdn.shopify.com/s/files/1/0439/3258/2056/files/zefutakixizisimu.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/
- https://cdn.shopify.com/s/fi

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off00006472.bin` `aae98c69036e1a25518dd5a072f2ecca02af20fdb5b3174545f58a240c5c78d5`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6472	4996 bytes
`font_01_sfnt_off00007559.bin` `16eacdd0a3a0c512b5f230691eca6fb21329cfe528e42f57abf5966927295253`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7559	14616 bytes

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