PDF malware analysis — malicious · 2f09a3661e6d592d

MALICIOUS

PDF

44.5 KB Created: 2020-08-31 21:18:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: da5116f424a97ee4a24327754bce28b1 SHA-1: 628afb3784a66db13eabf8f968080c78c7a6c102 SHA-256: 2f09a3661e6d592d21a31ab47c166c8f910d7b24737e0decc685eecd4c4428cf

152 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was flagged by a machine learning classifier as malicious and contains a significant number of embedded links, many of which point to a redirector service. The document body, though heavily obfuscated, contains a URL that appears to be part of a link farm designed to manipulate search engine results and drive traffic to potentially malicious sites. The primary malicious URL identified is ttraff.com, which is known to host redirectors.

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.com/wix?keyword=d.+n.+b+full+form+in+medical
- https://static.usrfiles.com/ugd/2e4eb4_8f605f9c1e054e83a3f9d7ab99a2bdfe.pdf
- https://static.usrfiles.com/ugd/ee9d3f_43972ea7912a4c76a2740e92991cd17f.pdf
- https://static.usrfiles.com/ugd/e2c6c1_226eed43673a47e6a4f35fc3b7802e68.pdf
- https://static.usrfiles.com/ugd/3e87bf_992035881eaf4a4794e533b2b22aa72a.pdf
- https://static.usrfiles.com/ugd/cc14e4_8215e635cbe649efa06ac727f71564f6.pdf
- https://static.usrfiles.com/ugd/136d07_67cd95b560a14a1389b05a91bef70e75.pdf
- https://static.usrfiles.com/ugd/d63aaf_64101fbf38ec47079ebeeaef85420940.pdf
- https://static.usrfiles.com/ugd/4c1554_42ba97dfbe7f4a2496f4bedb7966fc02.pdf
- https://cdn.shopify.com/s/files/1/0431/8570/1019/files/imperator_rome_console.pdf
- https://cdn.shopify.com/s/files/1/0431/6548/3168/files/33572020241.pdf
- https://cdn.shopify.com/s/files/1/0437/0913/7049/files/logic_design_interview_questions_and_answers.pdf
- https://cdn.shopify.com/s/files/1/0430/3529/5905/files/segoe_ui_font.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_off00006832.bin` `fe0ee0f6c62ce58f8145506c874489506a8ea26cdbf75825b04826e47015bbb9`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6832	5160 bytes
`font_01_sfnt_off000079ac.bin` `8387cc98d4d15d159bdbede3ef7736e9a829de8436de6d4d43c9fe17671ffdc6`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x79AC	14016 bytes

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