PDF malware analysis — malicious · 39f3cafd9da48a46

MALICIOUS

PDF

42.1 KB Created: 2020-08-03 18:00:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: a8c26ca4c257d75af460fa79adf0ae47 SHA-1: bb00bbf8607355a3fe170c2aed39231955e5aab0 SHA-256: 39f3cafd9da48a467aff00b8cb30279b1a3426032604dbdbe23a0fea9741200f

150 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous embedded links, with a critical heuristic firing for a malicious redirector. The document body, though partially corrupted, contains text suggesting a translation lure and includes the primary malicious URL. The presence of a link farm and ML classification further support its malicious nature. The primary malicious URL is https://ttraff.cc/pify?keyword=traducir+archivo+pdf+de+ingles+a+espa%25C3%25B1ol+gratis, which is likely used to redirect users to a malicious site.

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=traducir+archivo+pdf+de+ingles+a+espa%25C3%25B1ol+gratis
- http://files.buffaloxa.com/uploads/1/3/1/4/131453348/65c97e0a208ad56.pdf
- http://files.wordsoundguide.com/uploads/1/3/0/9/130968933/segigowogowonifot.pdf
- http://files.lajkonikchicago.us/uploads/1/3/2/6/132680853/rebejufataragowen.pdf
- https://cdn.shopify.com/s/files/1/0432/7673/0533/files/43535608807.pdf
- https://cdn.shopify.com/s/files/1/0430/8962/5250/files/kokulewaxogozalisej.pdf
- https://cdn.shopify.com/s/files/1/0427/3415/7991/files/75793338024.pdf
- https://cdn.shopify.com/s/files/1/0436/4979/4213/files/dipozelafaratedaf.pdf
- https://cdn.shopify.com/s/files/1/0430/8094/1729/files/brostrom_arthrex.pdf
- https://cdn.shopify.com/s/files/1/0436/5022/0185/files/fafafirosusagiri.pdf
- https://cdn.shopify.com/s/files/1/0429/1336/6182/files/79227585246.pdf
- https://cdn.shopify.com/s/files/1/0427/7128/4135/files/1210010772.pdf
- https://cdn.shopify.com/s/files/1/0431/0840/1316/files/99581352159.pdf
- https://cdn.shopify.com/s/files/1/0438/7805/6091/files/jawegugufar.pdf
- https://cdn.shopify.com/s/files/1/0438/7966/1736/files/exploring_psychology_myers_9th_edition.pdf
- https://cdn.shopify.com/s/files/1/0439/1036/5339/files/84_charlie_mopic.pdf
- https://cdn.shopify.com/s/files/1/0433/0687/7080/files/jotinu.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_off00006161.bin` `cf7127c396c835c1572c925f7ba6913262585210cb865e8dc29f728c7837d6f0`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6161	5640 bytes
`font_01_sfnt_off00007450.bin` `7e715fd203b08ae34a666f4c43c12f5e6f6f12c1db8bebfea63981b0505413ed`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7450	11292 bytes

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