PDF malware analysis — malicious · 99b13f9c3d0083b2

MALICIOUS

PDF

48.4 KB Created: 2020-08-30 11:01:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 6d31885125b67d7bc889aa6990f28600 SHA-1: 09c500575960bf0d3646037c4c7cf98a46c8c1a8 SHA-256: 99b13f9c3d0083b24d3cb2accf44010179377e3b6d98f3a3e1815dd43c2a1807

128 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a critical heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.cc/wix?keyword=patrick+marber+closer+play+pdf'. Additionally, another critical heuristic indicates a link farm, with many external PDF links hosted on 'static.usrfiles.com'. The document body, though heavily obfuscated, contains the same malicious URL. The presence of urgency language further supports the lure tactic.

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.
Urgency / deadline lure low SE_URGENCY_LURE

Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
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.cc/wix?keyword=patrick+marber+closer+play+pdf
- https://static.usrfiles.com/ugd/b8c837_2bedbac563294d1dbf8d5c7ac7b561d3.pdf
- https://static.usrfiles.com/ugd/b8c837_8a102dd05cd640c09c166b36a8101432.pdf
- https://static.usrfiles.com/ugd/db1da1_0052e449e607434e800db164ffb27960.pdf
- https://static.usrfiles.com/ugd/0286dd_3bd5af34f14841a6bb0dbdb0e1f6a838.pdf
- https://static.usrfiles.com/ugd/0bcf16_9bf0d9bcdae74df2bf36abdeac8ce450.pdf
- https://static.usrfiles.com/ugd/b42fd6_46767bff0fd94b68872f9490bc26bd62.pdf
- https://static.usrfiles.com/ugd/3bf302_292d29bc73d944a7890ccbff5581e50a.pdf
- https://static.usrfiles.com/ugd/10b11f_60940eb2bc23462fa5745f3f05580fed.pdf
- https://static.usrfiles.com/ugd/b8c837_559675a73b904d7ba612f4eb3e05f2b7.pdf
- https://static.usrfiles.com/ugd/b8c837_2d6608b009dd43d7ad134d5df9a149a7.pdf
- https://static.usrfiles.com/ugd/b8c837_547b6c285d3e4beda19b1578de8cca8a.pdf
- https://cdn.shopify.com/s/files/1/0450/1661/3014/files/understanding_viruses_3rd_edition_free.pdf
- https://cdn.shopify.com/s/files/1/0434/7127/4146/files/cvc_words_with_pictures_for_kindergarten.pdf
- https://cdn.shopify.com/s/files/1/0432/6768/6558/files/present_and_past_tense_exercises.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_off00007e55.bin` `7e78e2d0640255e5f1cccfd15ebca63c7e0f8c223cfe5b97d4fa714128653605`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7E55	5608 bytes
`font_01_sfnt_off0000914e.bin` `03608e98e3ed964a722b5ca380c436691824eb93be6e905aa457ecd200c97a02`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x914E	10720 bytes

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