PDF malware analysis — malicious · d97a4c82dbf668b4

MALICIOUS

PDF

46.9 KB Created: 2020-08-31 09:03:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: a4a3f080630f0f40f018afdd42657d1d SHA-1: f395d6be5deb7e085a5abae60ddd1b70316a3c02 SHA-256: d97a4c82dbf668b46e84dd1566a65eb6049da4c285d6c1e86b495a7494c66c78

150 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1059.001 PowerShell

This PDF document contains numerous embedded links, with a critical heuristic identifying a malicious redirector at 'https://ttraff.ru/wix?keyword=how+to+post+a+to+facebook'. The document body, though partially corrupted, suggests a lure related to posting content on Facebook. The presence of a large number of external links, many pointing to Shopify domains hosting other PDFs, indicates a link farm or redirection strategy. The ML classifier strongly flagged this PDF as malicious, supporting the conclusion that it is designed to redirect users to harmful content.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 3

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.
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=how+to+post+a+to+facebook
- https://cdn.shopify.com/s/files/1/0428/9835/8432/files/miveguxuxububepevomozit.pdf
- https://cdn.shopify.com/s/files/1/0434/6295/1077/files/63643198105.pdf
- https://cdn.shopify.com/s/files/1/0438/9273/6155/files/ipso_facto_clause_reforms.pdf
- https://cdn.shopify.com/s/files/1/0435/5116/2523/files/96268813010.pdf
- https://cdn.shopify.com/s/files/1/0432/2027/1272/files/book_of_legends_sefer_ha-_aggadah.pdf
- https://static.usrfiles.com/ugd/b8c837_66def0301fec4b8982a9bcd60fb46537.pdf
- https://static.usrfiles.com/ugd/e2f197_f8b388df797644ebae76ff0319f15152.pdf
- https://static.usrfiles.com/ugd/d43733_28a5de96c180445e8ad834b3303ae0ab.pdf
- https://static.usrfiles.com/ugd/b8c837_6c106e07f52c403bb00a9ab8189df849.pdf
- https://static.usrfiles.com/ugd/0779a3_89b408a610ea4faca3f17cbbe794499e.pdf
- https://static.usrfiles.com/ugd/fbccce_86c2a1735f194567920b039002e8ae09.pdf
- https://static.usrfiles.com/ugd/b8c837_cf32e965c29a4c1f94fa09da9f7de94e.pdf
- https://cdn.shopify.com/s/files/1/0448/5352/6690/files/xazolofanizamilokajamuxi.pdf
- https://cdn.shopify.com/s/files/1/0434/4299/5352/files/dediwepugisarivexij.pdf
- https://cdn.shopify.com/s/files/1/0435/3520/4511/files/fighting_sound_effects.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_off0000796d.bin` `987ad227301c2f1e191a96e75b0eb04cd2ff4eb9a06773c7e99a226c8c120427`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x796D	5140 bytes
`font_01_sfnt_off00008b0e.bin` `615ab8c071a6e4a87e58e333d1b123551b4caa709607bc6367a6c1359de2ede7`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8B0E	10500 bytes

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