MALICIOUS
234
Risk Score
Malware Insights
MITRE ATT&CK
T1566.002 Spearphishing Attachment
T1204.002 Malicious Link
The PDF contains a link that redirects to a known malicious domain, identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains text suggesting it is a 'Stihl ms250 operator's manual', which is likely a lure. The PDF also contains a large number of external links, as flagged by PDF_SEO_LINK_FARM, pointing to various PDF files hosted on Shopify. The primary malicious IOC is the redirector URL.
Machine Learning
- Nyx PDF Classifier malicious score 1.0000
Heuristics 6
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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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PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINKPDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
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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.cc/wb?keyword=stihl%20ms250%20operator In PDF document text
- http://files.cognissart.co.uk/uploads/1/3/1/3/131378918/goronefawogi_weduseru_ruwelusuvidugi_fisogepuk.pdfIn PDF document text
- http://files.pettyharbourmaddoxcove.ca/uploads/1/3/1/3/131379085/3527401.pdfIn PDF document text
- http://files.freedomheroesusahealingsanctuary.com/uploads/1/3/1/6/131607005/retutiretezese_gezani_weronobedetuxo_xarozo.pdfIn PDF document text
- http://vowowekul.tprrest.com/uploads/1/3/0/7/130776167/5433072.pdfIn PDF document text
- http://files.growingupstpete.com/uploads/1/3/1/4/131438617/folumu.pdfIn PDF document text
- https://ttraff.cc/wb?keyword=stihl%20ms250%20operator's%20manualIn 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/1/0438/5760/8864/files/feteki.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0432/8728/1832/files/santa_biblia_de_jerusalen.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0433/8096/5534/files/subomazerobo.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0434/5567/6580/files/nuevo_acuerdo_de_paz.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0428/7476/5475/files/nowabuzitowimo.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0437/6251/6122/files/ballin_mustard_free.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0431/2812/7637/files/electrochemical_quartz_crystal_microbalance.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0428/6890/0006/files/20040390100.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0433/3164/9689/files/31578910827.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0433/0936/7454/files/deadpool_kills_the_marvel_universe_kickass.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0431/4365/9677/files/investigating_oceanography.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0430/8212/1377/files/19007462397.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 |
|---|---|---|---|
font_00_sfnt_off00004837.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x4837 | 5592 bytes |
SHA-256: 4fcf87107f3fe13ce1563c370c5123ddedcfbd2b10382160449ce4f556ee86e3 |
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font_01_sfnt_off00005b0a.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x5B0A | 9444 bytes |
SHA-256: 099ba3370a2f874b26c276c57dfcff8138e600dd87de3d0ca39328b082894845 |
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