PDF malware analysis — malicious · 1a66e3d93cc51724

MALICIOUS

PDF

37.9 KB Created: 2020-08-29 06:01:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: a7b10845c0bf429522d774b84f40f3ec SHA-1: 635227d7ff9cd4cead32f0baf05822d70ff90199 SHA-256: 1a66e3d93cc5172402840243a7f310d5894cc39f859a16f75879a2fc5159ac06

150 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file was flagged as malicious due to a critical heuristic identifying a link to a known malicious redirector. The document body contains garbled text but also includes the suspicious URL. The presence of multiple links to external PDFs, some hosted on Shopify and static.usrfiles.com, suggests a link farm or distribution mechanism. The primary malicious IOC is the ttraff.ru redirector URL.

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=statik+kitab%25C4%25B1+soru+%25C3%25A7%25C3%25B6z%25C3%25BCmleri
- https://cdn.shopify.com/s/files/1/0432/4163/5997/files/61056953163.pdf
- https://cdn.shopify.com/s/files/1/0432/5048/3368/files/redexofidalabogogotori.pdf
- https://cdn.shopify.com/s/files/1/0431/4988/5606/files/bugup.pdf
- https://cdn.shopify.com/s/files/1/0431/1960/7965/files/sudajedunugogexogadu.pdf
- https://cdn.shopify.com/s/files/1/0435/1967/2472/files/17606108244.pdf
- https://static.usrfiles.com/ugd/b8c837_f62fa2c5847546c7a0229e23673290ac.pdf
- https://static.usrfiles.com/ugd/b8c837_02fc83144f7545f687d0250a539dcb4b.pdf
- https://static.usrfiles.com/ugd/b8c837_a2aa4996d8004f018d78baf8618dea8c.pdf
- https://static.usrfiles.com/ugd/b8c837_c7603f3b730b4ec0a5627ef94f09ea5f.pdf
- https://static.usrfiles.com/ugd/b8c837_410ac11a24bc4a97b1c6fbf94b111d5f.pdf
- https://static.usrfiles.com/ugd/b8c837_6ff7f1d9d89e4e2789087cad1ca41012.pdf
- https://static.usrfiles.com/ugd/b8c837_1ea1c3959d844548b409d93a3d539406.pdf
- https://static.usrfiles.com/ugd/b8c837_d0a240b999dd4962a9aaa97d70bbd310.pdf
- https://static.usrfiles.com/ugd/b8c837_a4c5e787f2bd47cd926fb14535470c8c.pdf
- https://static.usrfiles.com/ugd/b8c837_1a1b385dfa724ded9c2d146353f6fa11.pdf
- https://static.usrfiles.com/ugd/b8c837_9a55c4dce9a14d7fb8f43818fd586b1a.pdf
- http://www.w3.org/1999/02/22-rdf-syntax-ns#
- http://purl.org/dc/elements/1.1/
- https://yadi.sk/d/FPNIAC2MkiXEg
- 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 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off000045dc.bin` `c74666fd4965877ddca979df960efc75084a76258391bfd406e6548d26346c68`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x45DC	5436 bytes
`font_01_sfnt_off000057df.bin` `fa84063103272af1d16227590a0749f59ed7d07cbd6e34cf59ae58624ab0664a`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x57DF	10852 bytes
`font_02_sfnt_off00007aa6.bin` `4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7AA6	4324 bytes

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