PDF malware analysis — malicious · b395a5de9b5043eb

MALICIOUS

PDF

42.5 KB Created: 2020-09-02 21:43:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 61dc541cb6b512203b9ba1d048dc3416 SHA-1: 7ea1f7280c5989bc1d5ba93ea667a0c4148d5642 SHA-256: b395a5de9b5043eb6a1bfc9fc1be0da4c17f03a4f1ed52b1b0ab0ab7378af341

120 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF file contains numerous embedded links, with one specifically pointing to a known malicious redirector. The document body, though heavily obfuscated, contains text related to a 'rearrange words worksheet for grade 2', likely serving as a lure. The primary malicious IOC is the redirector URL, which is designed to lead the user to further malicious content.

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.club/wix?keyword=rearrange+words+worksheet+for+grade+2
- https://static.usrfiles.com/ugd/286fb8_abc1d511707d4f7eb463a0c5548cd4f6.pdf
- https://static.usrfiles.com/ugd/de65f7_6ac4b6505bca4b6a8d5277023f92c521.pdf
- https://static.usrfiles.com/ugd/7ba596_f74ee760d7de4db2ac5f234fd8d945a5.pdf
- https://static.usrfiles.com/ugd/625844_da707807299b4313a8ea09c8a43a3987.pdf
- https://static.usrfiles.com/ugd/625844_a84c3ce11b1747b58a761cd23adbf4c4.pdf
- https://cdn.shopify.com/s/files/1/0434/2651/3048/files/bible_story_pictures_to_color.pdf
- https://cdn.shopify.com/s/files/1/0465/8040/0295/files/dulujaluzaz.pdf
- https://cdn.shopify.com/s/files/1/0428/9203/4211/files/68769747361.pdf
- https://cdn.shopify.com/s/files/1/0431/9041/9620/files/minokezum.pdf
- https://cdn.shopify.com/s/files/1/0429/8558/6841/files/12159046595.pdf
- https://cdn.shopify.com/s/files/1/0428/9835/8432/files/nisexabidubukov.pdf
- https://cdn.shopify.com/s/files/1/0430/0124/9955/files/dijakuduxevinakabogiroj.pdf
- https://cdn.shopify.com/s/files/1/0435/8301/3023/files/pontiac_head_code.pdf
- https://cdn.shopify.com/s/files/1/0431/5516/1252/files/entropia_universe_hunting_guide.pdf
- https://cdn.shopify.com/s/files/1/0435/2707/8052/files/31726173732.pdf
- https://cdn.shopify.com/s/files/1/0431/3061/8011/files/46624684144.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 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off00005b5d.bin` `20a3eefca13f20e71c415c08b437bcfd54b91b39d8f49b71231bb7313ed796ec`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x5B5D	5172 bytes
`font_01_sfnt_off00006cfc.bin` `53ec918495be03927a3587ac47c77bafce25c9669f6e90302229e721f877cafb`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6CFC	9900 bytes
`font_02_sfnt_off00008ed2.bin` `4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8ED2	4324 bytes

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