PDF malware analysis — malicious · 38122630440221c6

MALICIOUS

PDF

38.3 KB Created: 2020-08-19 07:45:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: e564a98798bc92270dd41346adc4c651 SHA-1: 0a33972102a4a74bb7c0bb22f0b538a1c5c5057f SHA-256: 38122630440221c61b174e66d0eb2b9bed94914e001440cbec82849a2279965b

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a large number of embedded links, many of which point to Shopify domains with SEO-like slugs, suggesting a link farm. One of these links, 'https://ttraff.cc/pify?keyword=analfabetismo+digital+en+mexico+pdf', is identified as a malicious redirector. The ML classifier also strongly flagged this PDF as malicious. The presence of a link farm and a malicious redirector indicates an attempt to lure users to malicious content, likely for phishing or malware distribution.

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.cc/pify?keyword=analfabetismo+digital+en+mexico+pdf
- http://bafezesom.adamsonguardian.com/uploads/1/3/1/3/131380213/momowe.pdf
- https://cdn.shopify.com/s/files/1/0440/6771/7270/files/alopecia_difusa_femenina.pdf
- https://cdn.shopify.com/s/files/1/0433/1274/2564/files/75317874344.pdf
- https://cdn.shopify.com/s/files/1/0429/3407/5558/files/vekipepevedofumuso.pdf
- https://cdn.shopify.com/s/files/1/0433/8047/4014/files/dotamufuzasive.pdf
- https://cdn.shopify.com/s/files/1/0434/5951/0424/files/7745889355.pdf
- https://cdn.shopify.com/s/files/1/0434/9139/3698/files/54398466775.pdf
- https://cdn.shopify.com/s/files/1/0430/6770/3457/files/74771166834.pdf
- https://cdn.shopify.com/s/files/1/0439/4539/4331/files/guwinomutinodoloduradez.pdf
- https://cdn.shopify.com/s/files/1/0437/2021/2629/files/tecnologias_de_la_informacion_y_comunicacion_definicion.pdf
- https://cdn.shopify.com/s/files/1/0428/7974/6201/files/10160477872.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_off000056a0.bin` `6296885a62deecec4af19e4cb92631b31ca44d3b40a34ed9804a2d9c910e0a61`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x56A0	5576 bytes
`font_01_sfnt_off00006986.bin` `45955696248e9b344cb121dde295fecbf831e084c844c7e787a2db87161b19db`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6986	10624 bytes

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