MALICIOUS
194
Risk Score
Malware Insights
MITRE ATT&CK
T1566.002 Phishing: Spearphishing Attachment
T1204.002 Malicious Link
The PDF contains a large number of embedded links, many of which point to domains associated with link farms and redirectors, such as ttraff.ru. The document body, though heavily obfuscated, contains a URL that appears to be a lure for 'essential academic vocabulary answer key pdf'. The ML classifier strongly indicated maliciousness, and the PDF structure itself is indicative of SEO-based spam campaigns designed to drive traffic to malicious sites.
Machine Learning
- Nyx PDF Classifier malicious score 1.0000
Heuristics 5
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PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINKPDF 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.
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Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARMSmall 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.
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Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINKPDF 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.
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Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTALThe 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.
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Embedded URL info EMBEDDED_URLOne 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.ru/pify?keyword=essential+academic+vocabulary+answer+key+pdf In PDF document text
- http://mivutija.vietnamunitedfc.org/uploads/1/3/0/8/130814004/886bab0.pdfIn PDF document text
- http://files.eastcoastcoachingandconsulting.ca/uploads/1/3/2/6/132681928/tunatunokuxuju.pdfIn PDF document text
- http://files.brightonfd.com/uploads/1/3/0/8/130874691/zidunakixer-nuzewinubopu.pdfIn PDF document text
- http://ribasa.edmtool.com/uploads/1/3/1/4/131407222/bokepe.pdfIn PDF document text
- http://files.hillcountryimaging.com/uploads/1/3/2/7/132712154/raludonazijawot-xovadifazalev-powojurifanekuz.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/1/0437/4672/1946/files/gekofawusi.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0432/6768/6556/files/3075357199.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0433/0687/7080/files/tefabojukiva.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0428/5631/7091/files/64273673329.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0428/9835/8432/files/31321710084.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0427/9199/3500/files/nirolokogixuliwo.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0431/2167/2356/files/kumes.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0448/2033/2705/files/microwave_corn_on_the_cob_wax_paper.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0429/5180/3033/files/fajanozexozapogonofuwe.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0432/9131/2288/files/zuxipovu.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0433/4754/2165/files/d20_blood_and_guts.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0439/8442/1022/files/76975064532.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0436/8557/6857/files/3_phase_induction_motor_speed_control_methods.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0427/6905/5911/files/pozowudoze.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 2
Files carved from inside the sample during analysis.
| Filename | Kind | Source | Size |
|---|---|---|---|
stream_004_off0000633f.bin |
decompressed-pdf-stream | PDF FlateDecoded stream at offset 0x633F | 5716 bytes |
SHA-256: c43c57f812eda1612cb6eb8a86495345be4e842d69fd0b0d8478942f4e7d0578 |
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font_01_sfnt_off000076b8.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x76B8 | 10612 bytes |
SHA-256: 9db2c12f966864ef53b49b86983c44cd6deb3290696d7fd36955c34bea402a30 |
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