PDF malware analysis — malicious · 5a129f51154e7622

MALICIOUS

PDF

37.5 KB Created: 2020-08-19 08:24:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 35fda5e562bb8541483d31c53fb9a9ec SHA-1: e18cc98244a351fc8ce2f752f8827427e8540aa5 SHA-256: 5a129f51154e76228fd9a070478f2718a7127375f991dbd97c08a5ee7c642403

152 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1204.002 Malicious File

The PDF was flagged by a machine learning classifier and contains a large number of embedded links, many of which point to PDFs hosted on various domains. One critical heuristic indicates that a link points to known malicious redirector infrastructure. The document body contains garbled text but includes the URL 'https://ttraff.cc/pify?keyword=bosnian+english+dictionary', suggesting a potential lure or redirection mechanism.

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.cc/pify?keyword=bosnian+english+dictionary
- http://vivus.moonsiewshutters.com/uploads/1/3/1/4/131437605/banasewetedidadon.pdf
- http://jegeleno.kogsafe.com/uploads/1/3/2/6/132681482/9499392.pdf
- http://files.speaklifecollective.com/uploads/1/3/2/7/132710779/1808386.pdf
- https://cdn.shopify.com/s/files/1/0435/2344/0804/files/womokakofabew.pdf
- https://cdn.shopify.com/s/files/1/0432/8642/9861/files/56796452985.pdf
- https://cdn.shopify.com/s/files/1/0433/8545/4757/files/4797619985.pdf
- https://cdn.shopify.com/s/files/1/0431/9553/1424/files/5876428438.pdf
- https://cdn.shopify.com/s/files/1/0433/6844/8152/files/88627402433.pdf
- https://cdn.shopify.com/s/files/1/0433/5288/3352/files/wufinizomogemavavubamowij.pdf
- https://cdn.shopify.com/s/files/1/0428/6211/7030/files/40290372089.pdf
- https://cdn.shopify.com/s/files/1/0436/0008/5149/files/xesadamogufesulupemovut.pdf
- https://cdn.shopify.com/s/files/1/0431/2216/3876/files/62255350911.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_off00005483.bin` `01babe5df310778e54ab57d2c74424bce1beb2997735b53b151cbbd2acb02e51`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x5483	5352 bytes
`font_01_sfnt_off000066ac.bin` `cd984737224df6f8d1e6e57a6604823b043fff6ba85816c2d8d844bb67ce2319`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x66AC	10276 bytes

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