PDF malware analysis — malicious · e492dde5a026a4ff

MALICIOUS

PDF

34.3 KB Created: 2020-08-08 19:45:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: c250dfb564e0a7a55dc74f039dc8f7b8 SHA-1: a56affeaf094ca8215573767b349f053446330d0 SHA-256: e492dde5a026a4ff54a53c0b58b1d214117b235ef35942e64ecf7d4387cbf1f9

150 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a link farm and a malicious redirector URL, indicating an attempt to lure users to a compromised site. The document body, though heavily obfuscated, contains the primary malicious URL. The presence of numerous embedded links, many pointing to Shopify, suggests a tactic to disguise malicious activity within a large number of seemingly legitimate resources. The ML classifier strongly supports the malicious nature of this PDF.

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.com/pify?keyword=blessed+be+your+name+chords+pdf
- http://files.siliconvalleystalent.com/uploads/1/3/0/8/130814234/volizisen.pdf
- http://files.sjcacademy.com/uploads/1/3/1/8/131858592/cfd26d.pdf
- http://files.myeightcents.com/uploads/1/3/2/6/132682787/6045611.pdf
- https://cdn.shopify.com/s/files/1/0433/9780/8279/files/lebozidigepabud.pdf
- https://cdn.shopify.com/s/files/1/0432/7079/9510/files/tesadajetusunaje.pdf
- https://cdn.shopify.com/s/files/1/0433/3453/3275/files/losuritofojasufazuwamiwug.pdf
- https://cdn.shopify.com/s/files/1/0435/7757/3539/files/reverse_string_c.pdf
- https://cdn.shopify.com/s/files/1/0428/0310/1863/files/matlab_least_squares.pdf
- https://cdn.shopify.com/s/files/1/0428/8957/6601/files/13439435110.pdf
- https://cdn.shopify.com/s/files/1/0433/3086/3259/files/93819512254.pdf
- https://cdn.shopify.com/s/files/1/0433/0065/1158/files/a_level_physics_notes_download.pdf
- https://cdn.shopify.com/s/files/1/0430/4194/7801/files/25056491917.pdf
- https://cdn.shopify.com/s/files/1/0431/5106/5243/files/67928719068.pdf
- https://cdn.shopify.com/s/files/1/0437/8093/1742/files/66602580083.pdf
- https://cdn.shopify.com/s/files/1/0438/1445/3410/files/musikovi.pdf
- https://cdn.shopify.com/s/files/1/0441/3181/1480/files/jovirafiwojemerozerudedi.pdf
- https://cdn.shopify.com/s/files/1/0435/4975/3507/files/74555596480.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_off000048e6.bin` `7f64387c4518425635dcc37e7497febd71401d5df4df59df9c58f29f164b9b7d`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x48E6	5688 bytes
`font_01_sfnt_off00005c16.bin` `18ac2181c21957ee0f569f299830df4fae18131757978cf6ba0ea6df616e7a63`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x5C16	9368 bytes

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