PDF malware analysis — malicious · 13c49328a6685113

MALICIOUS

PDF

40.3 KB Created: 2020-08-24 04:14:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 82478645899eb6bbc1deae28aeadc145 SHA-1: 93e81798145b1f0f269914429b4d64d6f33c8404 SHA-256: 13c49328a66851136467afc68db0ffb915b4b7ced37a792df14a79222040804a

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document contains a large number of embedded links, many of which point to a link farm designed to redirect users. One prominent URL, https://ttraff.ru/pify?keyword=hungry+shark+hack++app, is flagged as a malicious redirector. The document body also contains this URL and advertises a "hungry shark hack app", suggesting a phishing or scam attempt to drive traffic to malicious infrastructure.

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=hungry+shark+hack++app
- http://files.crisisprexperts.com/uploads/1/3/1/4/131437981/001140ff534.pdf
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- https://cdn.shopify.com/s/files/1/0432/0349/4043/files/kovujegefewalog.pdf
- https://cdn.shopify.com/s/files/1/0430/4433/9861/files/6628078649.pdf
- https://cdn.shopify.com/s/files/1/0457/5061/6220/files/petexujubafevog.pdf
- https://cdn.shopify.com/s/files/1/0431/3864/6178/files/jadarelarur.pdf
- https://cdn.shopify.com/s/files/1/0436/0667/1517/files/kasimimajuzumogugunuluxol.pdf
- https://cdn.shopify.com/s/files/1/0432/0329/7438/files/north_west_corner_rule_method.pdf
- https://cdn.shopify.com/s/files/1/0434/7471/4790/files/5718935380.pdf
- https://cdn.shopify.com/s/files/1/0435/7164/2527/files/92353628955.pdf
- https://cdn.shopify.com/s/files/1/0430/0292/1111/files/45101428631.pdf
- https://cdn.shopify.com/s/files/1/0433/0491/1006/files/rijafusejugosilawilul.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_off00006113.bin` `93088bbb28c648392ed7b9035adc71bd87b68986aab7fffdbba374e57d66ab9f`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6113	5288 bytes
`font_01_sfnt_off00007308.bin` `03843cf5b6d088f9b5e57c225d376d6cbe36c16c5dd3961d2698406e0639bbfd`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7308	9932 bytes

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