PDF malware analysis — malicious · aa6f7f49a97103a0

MALICIOUS

PDF

40.4 KB Created: 2020-08-21 06:45:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: d84f69d9e5d7dcd6bde6acaf51430488 SHA-1: 6003e74e4b9a1594dc10e7728030fe8a0dcbe33a SHA-256: aa6f7f49a97103a0107be562a7a2a710725f68936f6dc2dedd26ac9e0222252e

152 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a prominent link that, when clicked, redirects to a malicious URL. This is further supported by heuristics indicating a malicious redirector and a link farm designed for SEO manipulation. The document body, though heavily obfuscated, contains the text 'Kinetic and potential energy lab answer key' and the malicious URL, suggesting a lure to trick users into clicking the link. The primary malicious IOC is the redirector URL.

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=kinetic+and+potential+energy+lab+answer+key
- http://files.gntc1.com/uploads/1/3/0/8/130814070/saduvar-lovofoxug-litatosawitimit-zufute.pdf
- https://cdn.shopify.com/s/files/1/0428/9835/8432/files/rowogumidakedodovejizana.pdf
- https://cdn.shopify.com/s/files/1/0435/6482/6783/files/bronte_agnes_grey.pdf
- https://cdn.shopify.com/s/files/1/0432/0280/5921/files/92774757177.pdf
- https://cdn.shopify.com/s/files/1/0434/5013/8784/files/mukerapa.pdf
- https://cdn.shopify.com/s/files/1/0436/3350/8512/files/96665299420.pdf
- https://cdn.shopify.com/s/files/1/0438/0455/7469/files/39404931599.pdf
- https://cdn.shopify.com/s/files/1/0433/9849/6412/files/86929822140.pdf
- https://cdn.shopify.com/s/files/1/0440/6142/5814/files/lipolutuzemagaboni.pdf
- https://cdn.shopify.com/s/files/1/0436/7115/8949/files/23235289822.pdf
- https://cdn.shopify.com/s/files/1/0449/3810/0891/files/brotherhood_of_war_full_movie.pdf
- https://cdn.shopify.com/s/files/1/0429/2942/2499/files/22011913613.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_off00005f7f.bin` `6dcd389ca155953bff9f43962d81c40e1e0be62e914637144c2cbc5da312b7a7`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x5F7F	5608 bytes
`font_01_sfnt_off000072af.bin` `1f30e31c3e866ff28bae03fd3ed1c5a879cf3158dbc3688721c66f4467f517c8`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x72AF	10036 bytes

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