PDF malware analysis — malicious · 2c440ef3cfcacaa4

MALICIOUS

PDF

47.8 KB Created: 2020-10-16 12:03:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10

MD5: 1507f2c2a5eba8f49558ada941546403 SHA-1: 4ab15b00405696fd8fe655463d4cf27c36ab3f70 SHA-256: 2c440ef3cfcacaa498e43ac3d5b186d19911ec61757476a7b4d944cdc93e20fa

194 Risk Score

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 5

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.
Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK

PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
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://gettraff.ru/123?keyword=ethical+hacking+full+syllabus+pdf In PDF document text
- https://cdn-cms.f-static.net/uploads/4368471/normal_5f87702212aff.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4370056/normal_5f88e30c80e25.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4368955/normal_5f8937a3a8017.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4365563/normal_5f881534b442a.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4369310/normal_5f88599cd996a.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4368745/normal_5f883e24c213f.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4368788/normal_5f87e846c95e0.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- http://www.daltonmaag.com/In PDF document text
- https://uploads.strikinglycdn.com/files/1c44b4b9-f3a4-43b0-98b5-ad8542d18284/pisatumaji.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/cedd5c5d-730a-4d81-b8f3-1b8f9c7992cf/mozulopusim.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/a2198b7a-bedd-4838-9376-fd9fc79d2136/zonoviset.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/864fe231-75f8-4464-b0b3-9738bcb1af6a/widofozojabavidivavuzigi.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/873697e8-020f-4384-aec7-36bf19639a2e/40619183246.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/7653110a-bfe7-4d6b-9e91-c87493c1cf54/pepowax.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/79a3e15d-38ab-4a58-a758-eeac29e1791a/64922505831.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/d3f5f832-3727-4930-bd0d-c1e95837c5e6/fejafipolesitusomudoleb.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/53b10415-c763-4835-97bb-ef2a6d3b7e26/royal_dirt_devil_model_103_manual.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0485/7561/1040/files/islamic_dream_interpretation_ibn_sirin_in_urdu.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0268/9010/9097/files/45949214115.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0428/7181/6358/files/55617265396.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0432/2315/4850/files/bokutachi_wa_benkyou_ga_dekinai_manga.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0437/8073/5138/files/indian_airline_codes.pdfIn PDF document text
- http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
- http://purl.org/dc/elements/1.1/In PDF document text
- http://ns.adobe.com/pdf/1.3/In PDF document text
- http://ns.adobe.com/xap/1.0/In PDF document text
- http://ns.adobe.com/xap/1.0/mm/In PDF document text
- http://ns.adobe.com/xap/1.0/rights/In PDF document text
- http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off00006ecf.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6ECF	5236 bytes
SHA-256: `28513ebf533b402b93fd413dd4410119fbbb73fa8cf6c3227377fde1ee97f3fe`
`font_01_sfnt_off00008091.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8091	10192 bytes
SHA-256: `743e04ae7c5fe6aeaec12ed7cfe141031e3895fd46d733c1fb9b9ffb75e1bee1`
`font_02_sfnt_off0000a358.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xA358	4324 bytes
SHA-256: `05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176`

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