PDF malware analysis — malicious · b1e031186a6d3cfb

MALICIOUS

PDF

46.1 KB Created: 2020-08-06 06:45:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: b7e59d7d76414832f277312afe23ff2a SHA-1: db8e4627936d65c23071a83cc35aee81e667f5f9 SHA-256: b1e031186a6d3cfbc92269b2ffdcb6f6fa7911b26dbbd7166006f8ff086f7889

150 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a significant number of embedded links, with the heuristic PDF_MALICIOUS_REDIRECTOR_LINK specifically identifying a link to a known malicious redirector. The heuristic PDF_SEO_LINK_FARM indicates a large number of external PDF links, suggesting a link farm or SEO manipulation tactic. The ML classifier also strongly flagged this PDF as malicious. The document body appears to be obfuscated or corrupted, but the presence of the URL 'https://ttraff.cc/pify?keyword=hormones+in+human+body+and+their+functions+pdf' suggests a lure related to health information, likely to trick users into clicking malicious links.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 3

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.
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://ttraff.cc/pify?keyword=hormones+in+human+body+and+their+functions+pdf
- http://files.ricelakemodelairplaneclub.com/uploads/1/3/1/3/131380482/1595841.pdf
- http://files.kimce.org/uploads/1/3/1/4/131437229/3143ec11d9c.pdf
- http://files.laurierobertson.ca/uploads/1/3/2/8/132814415/sefofatisujoganar.pdf
- https://cdn.shopify.com/s/files/1/0436/2177/7570/files/ganovenigelesexonu.pdf
- https://cdn.shopify.com/s/files/1/0432/5857/7046/files/jaleluzuni.pdf
- https://cdn.shopify.com/s/files/1/0428/0179/1132/files/33607863350.pdf
- https://cdn.shopify.com/s/files/1/0432/7066/8453/files/82307782721.pdf
- https://cdn.shopify.com/s/files/1/0428/9835/8432/files/85286147205.pdf
- https://cdn.shopify.com/s/files/1/0440/9776/5528/files/92384273031.pdf
- https://cdn.shopify.com/s/files/1/0437/6962/6781/files/68195586734.pdf
- https://cdn.shopify.com/s/files/1/0434/7727/0678/files/barron_s_us_history_regents_book.pdf
- https://cdn.shopify.com/s/files/1/0432/8947/7273/files/jazoguxixojox.pdf
- https://cdn.shopify.com/s/files/1/0431/7731/2405/files/53713953237.pdf
- https://cdn.shopify.com/s/files/1/0437/4295/3626/files/62692812642.pdf
- https://cdn.shopify.com/s/files/1/0431/7754/1787/files/13973432014.pdf
- https://cdn.shopify.com/s/files/1/0431/1734/6965/files/66450386648.pdf
- http://www.w3.org/1999/02/22-rdf-syntax-ns#
- http://purl.org/dc/elements/1.1/
- http://ns.adobe.com/pdf/1.3/
- http://ns.adobe.com/xap/1.0/
- http://ns.adobe.com/xap/1.0/mm/
- http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off000074b4.bin` `4aba6240d0a5f8d92b779cd6bb18e94cefd498284720839db377d3a8740f6ae1`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x74B4	5564 bytes
`font_01_sfnt_off00008775.bin` `72f38ce1913493908563e14e6769934e71e1c709822b8fb6fcf2685dc4e3f1b0`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8775	10004 bytes

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