PDF malware analysis — malicious · 1bdefec97f6fefbf

MALICIOUS

PDF

67.0 KB Created: 2020-10-20 13:03:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-25

MD5: 0e538a6f6dab34d949f59bd4141097d8 SHA-1: 2b2ba3fa68ac778ed8a807465b633dcb4c7a7233 SHA-256: 1bdefec97f6fefbf35cc9e10a68afd4d7a7581aa59bddbccdd968f1ad1cf1d0d

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://cctraff.ru/pify?keyword=%25D9%2583%25D8%25AA%25D8%25A8+%25D8%25A7%25D9%2586%25D8%25AC%25D9%2584%25D9%258A%25D8%25B2%25D9%258A%25D8%25A9+%25D9%2584%25D9%2584%25D9%2582%25D8%25B1%25D8%25A7%25D8%25A1%25D8%25A9+pdf In PDF document text
- https://jawasolasazilem.weebly.com/uploads/1/3/1/3/131379174/wovexofek.pdfIn PDF document text
- https://finazodaxuvoj.weebly.com/uploads/1/3/2/6/132682535/sebozuxodora_fexitaguw_pemates_jufafigovajavo.pdfIn PDF document text
- https://wonigebegi.weebly.com/uploads/1/3/1/6/131606731/femigi_tavug_jalenon_fijadafim.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4370309/normal_5f8a2b6b78f9b.pdfIn PDF document text
- https://wuwuleli.weebly.com/uploads/1/3/1/3/131398564/dugezug_verofuwisiwoku_viregek_jusuzupipepopo.pdfIn PDF document text
- https://kekerisasil.weebly.com/uploads/1/3/0/7/130775365/9996348.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4365525/normal_5f8c54e2c5617.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4365652/normal_5f8907179961c.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- https://uploads.strikinglycdn.com/files/41a6ce0e-6e98-462f-ab22-de56752cf227/lakafabulekikunasul.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/73bbc5a3-720d-47d5-b043-93804fe32728/vineloxez.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/ed1a77f2-1b72-4ff0-901a-64a5d5023690/zujovamu.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/da0694d1-8ed4-4d89-b6ea-a917de76d828/lozitiwogesobukijon.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/19dfc269-6286-4894-850d-1a88f4258f69/38095853296.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/811f62d7-702a-4ac6-abce-a03a52d3226c/tinizevogox.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/b7d2f276-a8b2-488c-93a9-63483033e5bd/tozevugofuxutupe.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/44e5de93-ebcc-4b21-a3af-05d741abbf39/gejidewulo.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/eec72bbb-f203-4333-b2e2-f784d832187d/17280519233.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://dejavu.sourceforge.netIn PDF document text
- http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
- http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`stream_006_off0000c513.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0xC513	31772 bytes
SHA-256: `4ddae04cc18640f3b4d8a9b01e859dbb5b932d6dc7822b7a5b3153439b18f708`
`font_00_sfnt_off0000813f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x813F	4424 bytes
SHA-256: `d660e4c0f1b7cef5d3a7f88c3c47983c9054fc81190b2cd2620317eafb2ca87e`
`font_01_sfnt_off00009066.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x9066	17804 bytes
SHA-256: `0c3dc012d8247f9dbec9041c69e6f497b2edac3fbe21f844ed2a5a7d7863d715`
`font_02_sfnt_off0000ab0c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xAB0C	7560 bytes
SHA-256: `23e7134308e4694d6e5745824f3c3c8d93d03b436c93b82a05df2cc4dd2d1bd2`

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