PDF malware analysis — malicious · 5b6c879c5eb15928

MALICIOUS

PDF

39.7 KB Created: 2020-08-25 03:21:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 15bd2321571ef03811dc7a6cc8b314b8 SHA-1: afd476df76f278af8c6665435260b0d57438df4c SHA-256: 5b6c879c5eb15928870a74e7c280300c6f19b7696d469ffb3bc91bd0ef446e7b

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded links, with a critical heuristic firing for a malicious redirector. The document body, though partially corrupted, suggests a lure related to 'Advanced grammar in use with answers'. The primary malicious URL identified is ttraff.cc, which is known for redirecting to malicious sites. The presence of many Shopify links, some flagged as benign, suggests a link farm intended to obscure the true destination.

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=advanced+grammar+in+use+with+answers
- http://files.professorjedi.com/uploads/1/3/1/3/131379730/xesodexajuzenes.pdf
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- https://cdn.shopify.com/s/files/1/0431/9445/0078/files/google_wifi_router_for_dsl.pdf
- https://cdn.shopify.com/s/files/1/0430/2936/4889/files/input_sensitivity_discord.pdf
- https://cdn.shopify.com/s/files/1/0429/5557/1353/files/getozilomuvukibebirut.pdf
- https://cdn.shopify.com/s/files/1/0434/3165/7621/files/gikubesetesemivazufufa.pdf
- https://cdn.shopify.com/s/files/1/0431/4942/6839/files/sufasevurobubeti.pdf
- https://cdn.shopify.com/s/files/1/0440/5365/9798/files/69829408357.pdf
- https://cdn.shopify.com/s/files/1/0428/5346/6271/files/34795368841.pdf
- https://cdn.shopify.com/s/files/1/0443/8137/2582/files/red_alert_gif.pdf
- https://cdn.shopify.com/s/files/1/0432/9930/7673/files/43126635751.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_off00005ee7.bin` `210c19bbfbdb47d7b3f6ee49e31b1324d8cfa3ddb640d827208bcca5c29dc7a0`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x5EE7	5464 bytes
`font_01_sfnt_off00007164.bin` `3a89b95c2eda11a9bcc5bb596bba033499d179770ac6dcb388b66af93f3c3fef`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7164	9684 bytes

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