PDF malware analysis — malicious · 8d6bc3b8a16f50a2

MALICIOUS

PDF

44.4 KB Created: 2020-08-31 22:39:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 9d4f9881760df0ca2faffb6e78825bd5 SHA-1: 5ee1405824f79a499c830b2dfb5af62282af8d62 SHA-256: 8d6bc3b8a16f50a292c17915b8995327a5285f9c1d35cd65ff26f382c3007c6c

150 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a heuristic firing for a malicious redirector link, which points to 'ttraff.me'. The document body, though heavily obfuscated, contains the same URL and appears to be a lure related to sheet music. The presence of a large number of external PDF links, many pointing to 'static.usrfiles.com', suggests a link farm or content distribution network used to host malicious or deceptive content. The ML classifier also strongly flagged this PDF as malicious.

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.me/wix?keyword=carol+of+the+bells+pentatonix+sheet+music
- https://static.usrfiles.com/ugd/b8c837_6573bfaeffc24253bee62bc962877ac2.pdf
- https://static.usrfiles.com/ugd/f3ecbe_64650e8dc112427fa58ca3ceadd610e3.pdf
- https://static.usrfiles.com/ugd/fdee49_c33f525b50644848a07d1cbbc1936fec.pdf
- https://static.usrfiles.com/ugd/77941b_017669a621354724aa0e4cf3adb8610b.pdf
- https://static.usrfiles.com/ugd/576447_e49bf40056c14a569628fa2d91306919.pdf
- https://static.usrfiles.com/ugd/4826f5_c40f4ca769d94dc2bf7dc682928552a9.pdf
- https://static.usrfiles.com/ugd/ae15ca_fcc9d9a1877c452181a06514695a067a.pdf
- https://static.usrfiles.com/ugd/b5472a_e000c4cd84b44443b14cfb9d8d8cb6d1.pdf
- https://static.usrfiles.com/ugd/b8c837_1e529965e6e147beb781697430368693.pdf
- https://static.usrfiles.com/ugd/0c8cc8_cf00bdad937646ebb74a934cc927eed0.pdf
- https://cdn.shopify.com/s/files/1/0433/9000/9502/files/16186345476.pdf
- https://cdn.shopify.com/s/files/1/0428/3249/4751/files/juvudos.pdf
- https://cdn.shopify.com/s/files/1/0440/5841/1160/files/xofomanoxolusasi.pdf
- https://cdn.shopify.com/s/files/1/0428/6195/3191/files/foxit.pdf
- https://cdn.shopify.com/s/files/1/0429/9682/6273/files/35358868258.pdf
- https://cdn.shopify.com/s/files/1/0433/8286/6072/files/lonorixavemowarut.pdf
- https://cdn.shopify.com/s/files/1/0432/6375/4404/files/4446637089.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_off000061d1.bin` `c373016ae832b73b4f260a45ef9fbfce8ebbbb64e36dfef12a337d7e66acb5f9`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x61D1	5368 bytes
`font_01_sfnt_off000073eb.bin` `c0d004f8f6bf633000ee25c69c45f1ce038999c91f7914fbf4fc8b12c4080c4b`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x73EB	14764 bytes

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