PDF malware analysis — malicious · 89a44dfc8a9639d7

MALICIOUS

PDF

63.1 KB Created: 2020-08-07 23:03:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: a6347316eb5d9d54cff4d8e2f558c596 SHA-1: 5a26d35cdcebb84b25647d24fcabbb44fb4cc86a SHA-256: 89a44dfc8a9639d753b59cc29cf7e5089d1d852c47170ca2cf183ac700e9d4ef

150 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF was flagged by multiple critical heuristics for containing malicious redirector links and a large number of external links, suggesting a link farm. The primary malicious URL identified is https://ttraff.cc/pify?keyword=java+string+programs+examples+with+output+pdf, which is a known malicious redirector. The document body, though heavily obfuscated, contains references to URLs, reinforcing the link-based attack vector. The ML classifier also strongly indicated maliciousness.

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=java+string+programs+examples+with+output+pdf
- http://files.fredtheafghan.com/uploads/1/3/0/7/130775735/8040291.pdf
- http://tukima.excellart.com/uploads/1/3/1/4/131453645/6411930.pdf
- http://files.camp-timberlake.com/uploads/1/3/1/1/131164473/tinuxaxexibaxe.pdf
- http://files.jeriowa.com/uploads/1/3/1/1/131164093/powunemajota-rubabejofuk-nitisopif.pdf
- http://kirewo.residenciaholidayrentals.com/uploads/1/3/1/0/131070420/334406.pdf
- https://cdn.shopify.com/s/files/1/0428/1729/0407/files/install_mtg_arena.pdf
- https://cdn.shopify.com/s/files/1/0438/2975/6066/files/15512547499.pdf
- https://cdn.shopify.com/s/files/1/0431/4021/9037/files/pny_window_driver.pdf
- https://cdn.shopify.com/s/files/1/0432/4796/0232/files/56950380589.pdf
- https://cdn.shopify.com/s/files/1/0432/0883/5229/files/gafuziguzu.pdf
- https://cdn.shopify.com/s/files/1/0433/9764/4449/files/jedexitigosaluvovavabati.pdf
- https://cdn.shopify.com/s/files/1/0432/0156/0737/files/82726791856.pdf
- https://cdn.shopify.com/s/files/1/0431/8468/5224/files/lokupexuxuxokigexidi.pdf
- https://cdn.shopify.com/s/files/1/0429/0835/2679/files/68634926618.pdf
- https://cdn.shopify.com/s/files/1/0428/1863/3894/files/15660406973.pdf
- https://cdn.shopify.com/s/files/1/0435/5263/7091/files/long_hair_reference.pdf
- https://cdn.shopify.com/s/files/1/0446/4692/4451/files/television_audience_research.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_off0000a877.bin` `c07b9f2d18c08bc1cb330a241c6bf9b41cab5cc98bb37b1afdbcc62c3d681b4d`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xA877	5664 bytes
`font_01_sfnt_off0000bbad.bin` `023840d586c2f3ac1a6466cfa91eaa3dec19118ab2fe6edae4f121bfe09aa867`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xBBAD	16564 bytes

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