PDF malware analysis — malicious · 67dfd7e1b31b65bf

MALICIOUS

PDF

39.9 KB Created: 2020-08-17 05:00:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 982092f16b0ea75d1842b8c1a510e295 SHA-1: edbea78cd845b809c59bd31350d508942a483116 SHA-256: 67dfd7e1b31b65bf2835e6caaca83686840b3bb6d6e17c4ea12f20530059d84c

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains embedded URLs and a document body that attempts to disguise itself as homework answers, a common lure. The primary URL, 'https://ttraff.cc/pify?keyword=econ+101+homework+4+answers', is flagged as a malicious redirector. The PDF also contains a link farm, suggesting SEO manipulation to distribute malicious content. No scripts were extracted, but the presence of embedded URLs and the lure indicate a phishing or redirection attempt.

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.cc/pify?keyword=econ+101+homework+4+answers
- http://lotomopul.coppermoonsculpture.com/uploads/1/3/1/3/131398101/nowasuletotosozov.pdf
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- https://cdn.shopify.com/s/files/1/0429/2388/4711/files/kiretijadorot.pdf
- https://cdn.shopify.com/s/files/1/0430/3188/8021/files/duberaradogutiruza.pdf
- https://cdn.shopify.com/s/files/1/0435/4641/1162/files/vetaxokasusekatov.pdf
- https://cdn.shopify.com/s/files/1/0434/4207/7846/files/taxigavawubufaxoja.pdf
- https://cdn.shopify.com/s/files/1/0434/5164/6119/files/english_story_books.pdf
- https://cdn.shopify.com/s/files/1/0431/7301/9808/files/34515508367.pdf
- https://cdn.shopify.com/s/files/1/0430/9821/0461/files/sogamisazuvasininulog.pdf
- https://cdn.shopify.com/s/files/1/0428/5058/2684/files/arduino_due_user_manual.pdf
- https://cdn.shopify.com/s/files/1/0431/4028/4583/files/fupiluvedes.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 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off00005868.bin` `756e0919064beecf45beb07e639ffae0b74c5f1cbd9710e33705a6e1c31c18b2`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x5868	5400 bytes
`font_01_sfnt_off00006aac.bin` `0cc4ec322cecf65ff497533d66d496ee6abc631652782bfb65da0a68527d213e`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6AAC	12560 bytes

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