PDF malware analysis — malicious · 08e88610076ac10f

MALICIOUS

PDF

45.6 KB Created: 2020-08-23 04:02:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: d3aad1569e357a015cf13952482e1a51 SHA-1: 1425baceb4aff132392b0d1d2691bc5c76389a3c SHA-256: 08e88610076ac10f002863e097f8804a3b222c048b0c6bcbeabccd8c451f7515

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains embedded links, one of which points to a known malicious redirector. The document body, though heavily obfuscated, contains text suggesting it is an answer key, likely a lure to encourage clicks. The presence of numerous external links, including a link farm, further supports a malicious intent to redirect users to potentially harmful content.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 4

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.
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://ttraff.com/pify?keyword=laboratory+3+worksheet+answer+key
- http://kupalori.fishandswallowpublications.com/uploads/1/3/0/9/130969744/lewejimili.pdf
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- http://www.daltonmaag.com/
- https://cdn.shopify.com/s/files/1/0435/7075/7791/files/81962166806.pdf
- https://cdn.shopify.com/s/files/1/0431/4923/0237/files/kinekup.pdf
- https://cdn.shopify.com/s/files/1/0431/8419/3696/files/fesedevegobadevimumo.pdf
- https://cdn.shopify.com/s/files/1/0428/9275/5111/files/nefijajize.pdf
- https://cdn.shopify.com/s/files/1/0439/3022/2747/files/68812375461.pdf
- https://cdn.shopify.com/s/files/1/0435/4929/4756/files/rigunol.pdf
- https://cdn.shopify.com/s/files/1/0429/6785/9359/files/beacon_house_developmental_trauma.pdf
- https://cdn.shopify.com/s/files/1/0428/8361/2831/files/51658703538.pdf
- https://cdn.shopify.com/s/files/1/0440/6896/2469/files/48892936318.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/
- http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off00006808.bin` `2465aed54d70455c508df3f47282df3a10113776ae7dbcc9059d201d8bed2ade`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6808	4984 bytes
`font_01_sfnt_off00007900.bin` `0b2215dee752349cfd3bbd61e964246f4b8cb7c26ef18bf54c6b2354e878af62`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7900	10224 bytes
`font_02_sfnt_off00009bdd.bin` `05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x9BDD	4324 bytes

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