PDF malware analysis — malicious · 8e5f3a81acbcd098

MALICIOUS

PDF

34.7 KB Created: 2020-10-24 23:08:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15

MD5: 5f6b030054cef68a1248dae5a14b5286 SHA-1: 3edeb1407a1f42753754ea3412bb0132c985ab35 SHA-256: 8e5f3a81acbcd0986846e7cccbcff938838f733ed0bf3679e0bdc48b59e1db82

152 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a heuristic firing for a malicious redirector link, pointing to 'https://ttraff.link/aws?keyword=pdf+to+word+converter+pro+apple'. This link is presented within the document body, suggesting a social engineering lure to trick users into clicking it. The PDF also exhibits characteristics of a link farm, with numerous embedded URLs, many of which are benign but likely used to mask the malicious redirector. The ML classifier strongly flagged this PDF as malicious.

Machine Learning

Nyx PDF Classifier malicious score 0.9998

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.link/aws?keyword=pdf+to+word+converter+pro+apple In PDF document text
- https://cdn-cms.f-static.net/uploads/4393016/normal_5f8e9f4a102d4.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4366007/normal_5f875a64a5d43.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4370285/normal_5f8a5fbb98d32.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4409826/normal_5f9423eaba78c.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4370068/normal_5f890fb7cf900.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4389352/normal_5f937b3c2f7dc.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4393499/normal_5f8e5dd67af09.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4369315/normal_5f8cb801897fe.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- https://cdn.shopify.com/s/files/1/0438/1684/5469/files/nextcloud_android_app_slow.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0435/2524/3040/files/43859101226.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0437/1188/9573/files/73907184458.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0483/0891/2291/files/jegikigur.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0484/3293/9166/files/gagigadipudotiw.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/d345aab6-e7d3-4282-a223-d71c53f0c0a7/sarexadimodipixisadi.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/678d00fd-32d9-40ab-90b4-f9f97be00b86/sinofokobekopeno.pdfIn PDF document text
- http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off00007327.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7327	5124 bytes
SHA-256: `a453945f425f04176c806eca008b9762ebc48516dbadce2e8e5b1f3058a6c91e`

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