PDF malware analysis — malicious · 4e4bdf9512b7430b

MALICIOUS

PDF

43.2 KB Created: 2020-08-03 19:13:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: cf09253834dd43faa7c4550fddf3204d SHA-1: d3abe95a4e54c29292f00f2374ab7e3e308d9a0a SHA-256: 4e4bdf9512b7430b3ac194f6f5fae2f4436249748397857f5bf51ab3303e2de2

152 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a mass external link farm, with many links pointing to Shopify domains and one critical link to a known malicious redirector at ttraff.ru. The document body, though heavily obfuscated, contains the URL https://ttraff.ru/pify?keyword=the+good+morrow+explanation+pdf, indicating a lure to a malicious site. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 4

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.
Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL

The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
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.ru/pify?keyword=the+good+morrow+explanation+pdf
- http://files.juliakellerbassist.com/uploads/1/3/0/8/130813357/xinefox.pdf
- http://files.intelekia-law.com/uploads/1/3/0/7/130739016/5452318.pdf
- http://files.whitthavenphotography.com/uploads/1/3/0/7/130739731/pajuno.pdf
- https://cdn.shopify.com/s/files/1/0432/4818/9603/files/zorir.pdf
- https://cdn.shopify.com/s/files/1/0428/9835/8432/files/25668779603.pdf
- https://cdn.shopify.com/s/files/1/0428/3088/9126/files/75644838961.pdf
- https://cdn.shopify.com/s/files/1/0431/6705/6023/files/34654194149.pdf
- https://cdn.shopify.com/s/files/1/0432/6568/7717/files/xixajuwidosexuj.pdf
- https://cdn.shopify.com/s/files/1/0428/9835/8432/files/51220099535.pdf
- https://cdn.shopify.com/s/files/1/0438/9208/0795/files/73820362136.pdf
- https://cdn.shopify.com/s/files/1/0440/0427/8422/files/vetanudidivemugidawogom.pdf
- https://cdn.shopify.com/s/files/1/0427/8606/2495/files/6441533237.pdf
- https://cdn.shopify.com/s/files/1/0428/3059/4204/files/74529186373.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_off00006ba5.bin` `277b8a6b14ce13b38dc6ca4ae6cdba7c8000e2291c82bf0c8465a388bf2fe6ce`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6BA5	5384 bytes
`font_01_sfnt_off00007de3.bin` `41d2a04ac605fa14940f51b5f5650760c30af36ad7fb4d88976156bbf52660b0`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7DE3	9940 bytes

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