PDF malware analysis — malicious · 921c3d84e02694cd

MALICIOUS

PDF

48.9 KB Created: 2020-09-04 07:47:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: ca3d4d4f48f1260af53c52d207702c5f SHA-1: 25921bd03a5699b4b705b99b9faa1b66b10ac85c SHA-256: 921c3d84e02694cd07195fa495e4ff4993f41bfe01266440ddd11260560325fa

152 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a link farm with numerous external links, including a critical redirector link to ttraff.link. The document body, though heavily obfuscated, also contains the same malicious URL. This indicates an attempt to lure the user to a malicious site, likely for further exploitation or credential harvesting.

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.link/wix?keyword=weather+report+magog+quebec
- https://cdn.shopify.com/s/files/1/0440/8151/2613/files/chads_vasc_score.pdf
- https://cdn.shopify.com/s/files/1/0431/2370/3970/files/alC3BCminyum_dC3B6kC3BCm_hatalarC4B1.pdf
- https://cdn.shopify.com/s/files/1/0429/8804/4442/files/tofanomuledogin.pdf
- https://cdn.shopify.com/s/files/1/0432/8423/4396/files/tremble_chords_g.pdf
- https://cdn.shopify.com/s/files/1/0435/4569/0266/files/purex_laundry_sheets_walmart.pdf
- https://static.usrfiles.com/ugd/50de67_208149beb95d4eaaa985d6aa97fe447d.pdf
- https://static.usrfiles.com/ugd/6260fe_c2e5be4867904b349b54514f81ad726e.pdf
- https://static.usrfiles.com/ugd/8e1900_82c98d5f355345f29cb9540b602271e7.pdf
- https://static.usrfiles.com/ugd/4cf28d_db2db64f31a544628b95373100aa2a88.pdf
- https://static.usrfiles.com/ugd/a86d68_8fc78ed2c45646d5924637f368759c66.pdf
- https://static.usrfiles.com/ugd/b8c837_de82ef8dd8774e5a86d629f3711181a5.pdf
- https://static.usrfiles.com/ugd/c34aa9_4d9bf900f2f34798a040596f151f8fee.pdf
- https://static.usrfiles.com/ugd/87fdc7_360dcb77e15d407fa2adbad8e1e6bfc7.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_off000072a3.bin` `6c139d78941ce5357ff32b62afaed2910a943909d95bbfa4bdb8474d119a074f`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x72A3	5416 bytes
`font_01_sfnt_off000084f2.bin` `8871bebe605bea02449e99258ae75c8e4256b4ae1c6a299fb1ea66eda50831cb`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x84F2	15776 bytes

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