PDF malware analysis — malicious · 74cb3840957e6405

MALICIOUS

PDF

40.5 KB Created: 2020-08-29 07:45:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: eddda6446fe2bbd31c40c643729e9e8a SHA-1: d45441d22b41e16d970c9db9f3a32c056dc66f92 SHA-256: 74cb3840957e64053ae30ae989fe7264921155c839a5a6a6c59792afe7643641

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many of which are designed to appear as benign PDF files hosted on Shopify. However, one critical link points to 'ttraff.com', which is flagged as a known malicious redirector. This suggests a phishing or scam attempt where users are directed to malicious infrastructure under the guise of accessing PDF documents. 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/wix?keyword=pensamiento+matematico+pdf
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- https://cdn.shopify.com/s/files/1/0437/2214/5943/files/roomy_bookmarks_toolbar.pdf
- https://cdn.shopify.com/s/files/1/0431/8117/9048/files/xozokifipopotomed.pdf
- https://cdn.shopify.com/s/files/1/0428/5900/4070/files/duwidomasugubelufatabu.pdf
- https://cdn.shopify.com/s/files/1/0428/9835/8432/files/welilavuruwad.pdf
- https://cdn.shopify.com/s/files/1/0434/3185/4247/files/37123406057.pdf
- https://cdn.shopify.com/s/files/1/0431/7334/7488/files/30418220267.pdf
- https://cdn.shopify.com/s/files/1/0428/9314/8313/files/zikiwiv.pdf
- https://cdn.shopify.com/s/files/1/0429/5249/1159/files/37684751029.pdf
- https://cdn.shopify.com/s/files/1/0433/0507/4838/files/statistical_sampling_methods.pdf
- https://cdn.shopify.com/s/files/1/0433/1801/8203/files/xovijun.pdf
- https://cdn.shopify.com/s/files/1/0429/6704/0154/files/lajapunirowogiselo.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_off00005f97.bin` `85e27e4b1e6c9e4c2690dcbf15715aa9493799fddbe60674f05647a0d8aabbeb`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x5F97	5172 bytes
`font_01_sfnt_off00007119.bin` `e2c71fd79c038acb69f3f1ac1890cb4ff539354cb331e13153befbd7fec4570d`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7119	10884 bytes

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