PDF malware analysis — malicious · fa830c2532e000bc

MALICIOUS

PDF

42.5 KB Created: 2020-08-19 02:54:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: a7383568dd2930421676668ffc1ad05b SHA-1: d2d5b49082f9555d5f247c9bd64476c5a7469b33 SHA-256: fa830c2532e000bc34866efdf3b8916d2551333b884f9567dff79c20c6f271b0

150 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.cc'. Additionally, it exhibits characteristics of a PDF link farm, with numerous external links, many hosted on Shopify. The document body, though partially corrupted, contains text related to an 'Absa student loan application form', suggesting a lure to entice users to click the malicious link. The ML classifier also strongly flagged this PDF as malicious.

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=absa+student+loan+application+form
- http://files.skski.net/uploads/1/3/1/8/131871799/fumijifivi-vosadeguguzubok-pudez-tikekadexipowa.pdf
- http://files.marobishop.com/uploads/1/3/0/7/130740586/fb895d3fc8.pdf
- https://cdn.shopify.com/s/files/1/0432/0994/9341/files/zadutejemuboziwo.pdf
- https://cdn.shopify.com/s/files/1/0434/0698/3333/files/neoplasia_endocrina_multiple_tipo_2a.pdf
- https://cdn.shopify.com/s/files/1/0434/2739/7797/files/muvivumagilamak.pdf
- https://cdn.shopify.com/s/files/1/0439/1262/6344/files/xituduzulope.pdf
- https://cdn.shopify.com/s/files/1/0428/8525/1235/files/19304693581.pdf
- https://cdn.shopify.com/s/files/1/0429/0058/6649/files/gesagutipeluta.pdf
- https://cdn.shopify.com/s/files/1/0435/8265/2579/files/network_study_guide.pdf
- https://cdn.shopify.com/s/files/1/0428/9835/8432/files/21244882445.pdf
- https://cdn.shopify.com/s/files/1/0432/5995/3312/files/chemistry_concepts_and_applications_textbook.pdf
- https://cdn.shopify.com/s/files/1/0428/7424/1187/files/54978452053.pdf
- https://cdn.shopify.com/s/files/1/0430/4371/7274/files/moxovokepari.pdf
- https://cdn.shopify.com/s/files/1/0447/8880/9879/files/thriller_story_books_download.pdf
- https://cdn.shopify.com/s/files/1/0431/7990/1096/files/blanchard_grinder_manual.pdf
- https://cdn.shopify.com/s/files/1/0428/5195/8947/files/68800289391.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_off00006816.bin` `384f1a0b2736a12d359656ad6999ef7ed34dc8f7f56851e464a6cf34a7254509`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6816	5432 bytes
`font_01_sfnt_off00007a68.bin` `f5bbcc2218519c435ada96bd349fa532ac0f09a0f60746c448640fd8fd636748`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7A68	10244 bytes

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