MALICIOUS
194
Risk Score
Malware Insights
MITRE ATT&CK
T1566.002 Spearphishing Attachment
T1059.001 PowerShell
The PDF contains a heuristic firing for a malicious redirector link, directing users to `https://ttraff.ru/wb?keyword=csec%20human%20and%20social%20biology%20past%20papers%20pdf`. It also contains a link farm heuristic, with many links pointing to `cdn.shopify.com` and one to `http://lifov.microbesbymarco.com/uploads/1/3/2/8/132816066/3feecf4dd13f68.pdf`. The document body, though heavily obfuscated, contains these URLs, suggesting a lure to academic content to mask malicious redirection.
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/wb?keyword=csec%20human%20and%20social%20biology%20past%20papers%20pdf In PDF document text
- http://lifov.microbesbymarco.com/uploads/1/3/2/8/132816066/3feecf4dd13f68.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://cdn.shopify.com/s/files/1/0431/6784/2459/files/97349517540.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0428/2312/3100/files/22122143617.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0432/1676/5088/files/zukawoboxutorako.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0434/6567/0806/files/data_structures_and_algorithms_for_interviews.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0432/9262/3013/files/bbc_english_grammar.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0431/2950/3908/files/85891011864.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0432/4727/2098/files/cnet_free_s_for_windows_10.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0430/3536/1442/files/44406856639.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0432/0909/7384/files/zoxisotebifewabujewoze.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0432/0113/4747/files/razilikojulifizatujuguk.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0434/0187/1512/files/toefl_ibt_test_structure.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0432/6621/2003/files/momujeliwenusipivagevisad.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0429/5625/9491/files/difolutenifax.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_off000042c3.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x42C3 | 5716 bytes |
SHA-256: bda0a45af1bd13ed9cd02fb07e77e0e91942860d30507e2ee4d3767caab6493d |
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font_01_sfnt_off0000560b.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x560B | 9456 bytes |
SHA-256: c04891db2119ff00528bd0be0f654f6301ed8321220a353dbe39d8392e189b60 |
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font_02_sfnt_off00007651.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x7651 | 4324 bytes |
SHA-256: ad623bc7c681097dfa1224999cf6cc6072d3ca9a137655dc1129b0261f0b357c |
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