PDF malware analysis — malicious · d8310163e810d944

MALICIOUS

PDF

42.3 KB Created: 2020-09-01 02:38:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: fdc64f4dc66d34c6baf8c015b282e199 SHA-1: 9e93e99b2cd55b07260aa4ca0f06e2e91355010f SHA-256: d8310163e810d944c130bb6614dee87c91f8d28dc875675c5938149e609cd9cf

152 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a critical heuristic firing for a malicious redirector link, specifically pointing to 'ttraff.ru'. The document body, though heavily obfuscated, also contains this URL. Additionally, the PDF exhibits characteristics of a link farm, with numerous embedded URLs, many of which are benign but likely serve to mask the malicious redirector. The primary intent appears to be directing users to a malicious site via the 'ttraff.ru' URL.

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/wix?keyword=what+is+android+one+means
- https://static.usrfiles.com/ugd/63d3ad_35bc6c7d3c48476eac13013fbd69c2aa.pdf
- https://static.usrfiles.com/ugd/7198c1_34919c37b57748068f51d7cadf58966a.pdf
- https://static.usrfiles.com/ugd/50c35f_4d0b328e4e4e4a69a3e7291b68db1264.pdf
- https://static.usrfiles.com/ugd/79cb75_5a617b4bb9c64501ae5fd9a60540e51b.pdf
- https://static.usrfiles.com/ugd/469aea_15471ff7bfc24218aeefc75903f3ee4b.pdf
- https://cdn.shopify.com/s/files/1/0434/3542/5944/files/nokarox.pdf
- https://cdn.shopify.com/s/files/1/0433/1244/7652/files/zozisonojabisoxumupowuk.pdf
- https://cdn.shopify.com/s/files/1/0433/0687/7080/files/46824776831.pdf
- https://cdn.shopify.com/s/files/1/0432/4098/0643/files/eminem_rap_god_fast_part.pdf
- https://cdn.shopify.com/s/files/1/0435/2026/2308/files/52605039404.pdf
- https://cdn.shopify.com/s/files/1/0428/9835/8432/files/70354855800.pdf
- https://cdn.shopify.com/s/files/1/0434/6871/8232/files/ccleaner_pro_onhax.pdf
- https://cdn.shopify.com/s/files/1/0432/0159/3507/files/dubaforewivonunobo.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_off0000682c.bin` `5040d31daca5867a5c78df21f668e55ab1f0bf6346dd7e01c23933ddb3af10f4`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x682C	5048 bytes
`font_01_sfnt_off00007930.bin` `0446f234fbc02f046e25839efc1464c4025d60ad0219797cccc319022035c12b`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7930	10340 bytes

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