PDF malware analysis — malicious · b938917d6421f741

MALICIOUS

PDF

36.0 KB Created: 2020-08-07 22:46:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 9ed9c55e8b4087d4bced24d612690cc4 SHA-1: e1454194047af7d08f18c6eeb023f752b909cfa6 SHA-256: b938917d6421f7416bbf5eb5cb905cfc92b4963c238e03d068f0e447732690c3

150 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Phishing: Spearphishing Attachment T1059.001 Command and Scripting Interpreter: PowerShell

The PDF contains a mass external link farm, with a primary malicious redirector URL disguised as a dictionary download. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK indicates the primary URL leads to known malicious infrastructure. The ML classifier strongly supports the malicious nature of this PDF. The document body, though heavily obfuscated, contains the malicious URL and references to download a dictionary, reinforcing the phishing lure.

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=dictionary+english+to+urdu+free+download+full+version+pdf
- http://files.ulstl.com/uploads/1/3/0/7/130739786/kudinekokomi-rigugiv-mokakakewiv-gasugu.pdf
- http://files.geraldsandau-sculpture.com/uploads/1/3/1/0/131070633/9625127.pdf
- http://files.matakanacommunitygroup.online/uploads/1/3/1/3/131384070/6366111.pdf
- http://files.epicministry.net/uploads/1/3/1/3/131384432/junil-pojawok.pdf
- http://files.politicaltoons.net/uploads/1/3/1/4/131483009/gofixixivojo_bomusuw.pdf
- https://cdn.shopify.com/s/files/1/0430/4610/9345/files/dalujipuvoxafimoxi.pdf
- https://cdn.shopify.com/s/files/1/0433/7513/2824/files/28919028145.pdf
- https://cdn.shopify.com/s/files/1/0433/0687/7080/files/77636621448.pdf
- https://cdn.shopify.com/s/files/1/0434/7399/3890/files/lugozugaxatudinu.pdf
- https://cdn.shopify.com/s/files/1/0430/1619/2153/files/wagner_bridal_chorus.pdf
- https://cdn.shopify.com/s/files/1/0430/7140/6234/files/nagatumuxadanuval.pdf
- https://cdn.shopify.com/s/files/1/0437/2732/3301/files/23729175080.pdf
- https://cdn.shopify.com/s/files/1/0431/7921/2959/files/42050550547.pdf
- https://cdn.shopify.com/s/files/1/0432/8049/8841/files/96391847070.pdf
- https://cdn.shopify.com/s/files/1/0428/0877/0726/files/zuxasebuzejibi.pdf
- https://cdn.shopify.com/s/files/1/0431/1570/8580/files/27434115117.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_off00004dfc.bin` `66feee10f139eb81b328daefd305eec337e8ce7605309cf938cb485364146626`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x4DFC	5668 bytes
`font_01_sfnt_off00006168.bin` `341ba9ae23bce5a5da25625c0dc0e43fb130a96ad1d3691c07f142870a2d0f50`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6168	9652 bytes

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