PDF malware analysis — malicious · 82da9535851a58a7

MALICIOUS

PDF

45.2 KB Created: 2020-09-02 13:24:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: b5c9a9edbaf57642cca4f1af487883d4 SHA-1: 5c05912f9e769148dd5c8a1b930a3a353839bc09 SHA-256: 82da9535851a58a70022bd2137f50a3a8490091a2f31d72671ff4ab48dec8eaf

128 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was identified as malicious due to a critical heuristic firing for PDF_MALICIOUS_REDIRECTOR_LINK, indicating it directs users to known malicious infrastructure. Additionally, the PDF_SEO_LINK_FARM heuristic detected a large number of embedded links, with the primary malicious URL being 'https://ttraff.club/wix?keyword=chat+app++for+android+mobile'. The document body, though heavily obfuscated, contains similar text, reinforcing the lure. The presence of numerous links suggests a broad distribution attempt, likely for phishing or malware delivery.

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.club/wix?keyword=chat+app++for+android+mobile
- https://cdn.shopify.com/s/files/1/0431/0944/9884/files/structure_and_bonding_in_organic_chemistry.pdf
- https://cdn.shopify.com/s/files/1/0427/9874/3719/files/zulun.pdf
- https://cdn.shopify.com/s/files/1/0431/5345/7320/files/20445940242.pdf
- https://cdn.shopify.com/s/files/1/0439/4795/0248/files/xoligotiwizalas.pdf
- https://cdn.shopify.com/s/files/1/0432/1030/9787/files/area_of_complex_shapes_worksheet.pdf
- https://static.usrfiles.com/ugd/e4a001_f0c31ec35d8c4f02817853c624c427fe.pdf
- https://static.usrfiles.com/ugd/7820d0_53ded788107b4fd9890bec86e717ae7c.pdf
- https://static.usrfiles.com/ugd/e4a001_d0c334f79c084cb1aef3146dede4646e.pdf
- https://static.usrfiles.com/ugd/b8c837_a3c3082f7c82491f8803818f1078a616.pdf
- https://static.usrfiles.com/ugd/b8c837_29cc4f099a0f4d629efbc9cdbdbc87e2.pdf
- https://static.usrfiles.com/ugd/b28561_66f80930c25b4bc4ad1256e6076172e7.pdf
- https://static.usrfiles.com/ugd/b8c837_eea4112683c54a28bbe9606a482bf2ab.pdf
- https://static.usrfiles.com/ugd/b8c837_74e0458252074051bff3d1f92af7861c.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_off0000734b.bin` `015568416c0d28423dee7253125f618fff00691ddb5a0da900c7712437bea000`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x734B	5148 bytes
`font_01_sfnt_off00008497.bin` `b416ce847cfe6776bf6a025d7f249a20ce160b30519939eff176637a17ea73cb`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8497	10292 bytes

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