PDF malware analysis — malicious · 690d5c311b2728bf

MALICIOUS

PDF

45.5 KB Created: 2020-08-14 20:24:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 3f415a972e285d5fed4233cec8cded5f SHA-1: 531fca61a25a5ffe879f92d27925e109997002dd SHA-256: 690d5c311b2728bf2efc369f0c579854e4d022ba75e7403ae35d86082fee4544

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a link to a known malicious redirector, ttraff.ru, which is likely intended to lead the user to a phishing or malware distribution site. The document body, though heavily obfuscated, contains the same URL, suggesting a deliberate attempt to trick the user into clicking it. 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.ru/pify?keyword=cute+newborn+babies+images
- http://files.natureworld.com.au/uploads/1/3/1/3/131379439/woketurip.pdf
- http://tezuxomif.phloxdivinity.org/uploads/1/3/1/4/131437657/bd59fed32de7.pdf
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- https://cdn.shopify.com/s/files/1/0440/6575/1192/files/passive_present_simple_past_simple_exercise.pdf
- https://cdn.shopify.com/s/files/1/0430/9689/9733/files/14627703856.pdf
- https://cdn.shopify.com/s/files/1/0436/9845/4693/files/70000817541.pdf
- https://cdn.shopify.com/s/files/1/0447/8484/4949/files/mystring_class_c.pdf
- https://cdn.shopify.com/s/files/1/0431/7279/0427/files/59178057789.pdf
- https://cdn.shopify.com/s/files/1/0428/0962/2687/files/69451979485.pdf
- https://cdn.shopify.com/s/files/1/0436/5756/0217/files/70244553781.pdf
- https://cdn.shopify.com/s/files/1/0440/6345/7432/files/menojulodusow.pdf
- https://cdn.shopify.com/s/files/1/0444/1505/8086/files/beef_recipe.pdf
- https://cdn.shopify.com/s/files/1/0432/5359/6322/files/vakisinubit.pdf
- https://cdn.shopify.com/s/files/1/0433/1811/6510/files/sizerurisapezuvakif.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_off00007496.bin` `7bd9e7d130e6c10b5d3cbfae2a0f5c744b93cfff2ad0de0663cbbb9f769b57dd`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7496	5112 bytes
`font_01_sfnt_off000085f1.bin` `295630ba8a9f0017313bca9472bc616b8fdaaa604cb1cd601091a93e89a4bf19`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x85F1	10352 bytes

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