PDF malware analysis — malicious · b51d4cc6646939fc

MALICIOUS

PDF

50.1 KB Created: 2020-08-05 09:30:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: afd7573783225ed0eba2a52abf8f23c5 SHA-1: 3eef4289d403b147e2031991cc2bf8ccc319f0b9 SHA-256: b51d4cc6646939fcf75e8bef4b6748d1e96877a0b7c3718c6cb3fd635f53fa1b

150 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains numerous embedded links, many of which point to a link farm hosted on cdn.shopify.com, a common technique for SEO poisoning. One critical heuristic identified a link to a known malicious redirector at 'https://ttraff.com/pify?keyword=factorising+quadratic+equations+worksheet+pdf'. This suggests the document is designed to trick users into clicking through to malicious sites, likely for phishing or malware distribution. No scripts were extracted, but the PDF structure and link farm indicate a social engineering attack.

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.com/pify?keyword=factorising+quadratic+equations+worksheet+pdf
- http://fodof.jenniferphamportfolio.com/uploads/1/3/0/8/130874276/e9d1aba49.pdf
- http://lelun.congletondogtraining.co.uk/uploads/1/3/0/8/130814769/virimuzebusejuw.pdf
- http://files.gingerfitspo.com/uploads/1/3/1/8/131858287/wujelep-rijiw.pdf
- https://cdn.shopify.com/s/files/1/0429/4891/9450/files/54126129304.pdf
- https://cdn.shopify.com/s/files/1/0428/1391/5303/files/xebomokuribedob.pdf
- https://cdn.shopify.com/s/files/1/0433/0212/5733/files/70684526054.pdf
- https://cdn.shopify.com/s/files/1/0434/3437/7372/files/lesson_plan_in_english_literature.pdf
- https://cdn.shopify.com/s/files/1/0432/7437/1235/files/between_shades_of_gray_espaol.pdf
- https://cdn.shopify.com/s/files/1/0434/2992/0930/files/affiliate_marketing_definition.pdf
- https://cdn.shopify.com/s/files/1/0438/1101/2770/files/nadovopuwidoviwupetosara.pdf
- https://cdn.shopify.com/s/files/1/0429/4439/7468/files/19101040521.pdf
- https://cdn.shopify.com/s/files/1/0431/3061/8020/files/44598594190.pdf
- https://cdn.shopify.com/s/files/1/0434/6744/0290/files/voxasuvege.pdf
- https://cdn.shopify.com/s/files/1/0450/6664/9750/files/minecraft_crash_log.pdf
- https://cdn.shopify.com/s/files/1/0438/8922/9979/files/31747341536.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_off00007def.bin` `cc5559f63ef6ec02852b756d155294c5e672ea15cee322168616f96046bff0bc`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7DEF	5624 bytes
`font_01_sfnt_off00009118.bin` `3fd9859cd85425cb31099efeca3072eb782769e21dfd84774a2702af1427e623`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x9118	13504 bytes

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