PDF malware analysis — malicious · 4746685d25991415

MALICIOUS

PDF

37.1 KB Created: 2020-09-09 17:47:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 0146ca99caf2fde3a32e7b6fe57e2ea3 SHA-1: 2f231e76b7d44d724f77a9754ad9d86148403068 SHA-256: 4746685d259914152dc6e50b6d336e89bfe5fa7ce5356afac2bc53694e663ed7

150 Risk Score

Malware Insights

MITRE ATT&CK

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.club/wix?keyword=acronis+snap+deploy+5+user+guide'. This indicates the document's primary purpose is to redirect users to a malicious site. The presence of a large number of external PDF links, many hosted on cdn.shopify.com, suggests a link farm or SEO poisoning tactic to improve the ranking of the malicious redirector. 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.club/wix?keyword=acronis+snap+deploy+5+user+guide
- http://jikude.biesebroek.eu/uploads/1/3/1/8/131856072/fozibegidubewojenov.pdf
- https://cdn.shopify.com/s/files/1/0428/9318/1081/files/33137445697.pdf
- https://cdn.shopify.com/s/files/1/0457/6808/1574/files/come_alive_vidya_song.pdf
- https://cdn.shopify.com/s/files/1/0432/2938/0767/files/recurrent_spontaneous_abortion.pdf
- https://cdn.shopify.com/s/files/1/0464/8104/7720/files/hackerone_latest_report.pdf
- https://cdn.shopify.com/s/files/1/0430/7048/8730/files/2727055342.pdf
- https://cdn.shopify.com/s/files/1/0435/8170/2301/files/wulimag.pdf
- https://cdn.shopify.com/s/files/1/0439/1131/5611/files/free_customizable_monthly_calendar_templates.pdf
- https://cdn.shopify.com/s/files/1/0437/9485/8133/files/sat_2_biology_photosynthesis_questio.pdf
- https://cdn.shopify.com/s/files/1/0434/5099/0753/files/2356936437.pdf
- https://static.usrfiles.com/ugd/3e7897_b84efffd0e694fd6b6ab197216402629.pdf
- https://static.usrfiles.com/ugd/8e1900_b5e6d5e6d565471591e05cbbab701bf1.pdf
- https://static.usrfiles.com/ugd/faa7ef_0eb52a822b0a4098a3b678ecbcaa2573.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_off0000470b.bin` `acb309cd685150f4303386f3a2338690b5d7184dd3e3708c2e1a1c4e90e90f65`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x470B	5260 bytes
`font_01_sfnt_off000058e9.bin` `da410e83144f50204bbd8531865235d279982a120ae90d591101d9e345ce9cd5`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x58E9	9584 bytes
`font_02_sfnt_off000079ac.bin` `b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x79AC	4324 bytes

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