PDF malware analysis — malicious · 08bc2f6f48efb213

MALICIOUS

PDF

42.1 KB Created: 2020-08-23 08:15:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: aa17a160e402962bc741a44a6c966eb0 SHA-1: 844a6cdf6819f6abfca9ef9d459155a545ec4245 SHA-256: 08bc2f6f48efb213908c602f1984c56b5ce24d3d2164efce056e29bf7435ff85

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links, with at least one pointing to a known malicious redirector infrastructure (ttraff.com). The document body, though heavily obfuscated, also contains this URL, suggesting an attempt to direct users to malicious content. The ML classifier also strongly indicated maliciousness.

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.com/pify?keyword=cape+lime+margarita+nutrition+information
- http://files.swshdc.com/uploads/1/3/1/3/131383483/jufobegaj-wamiwijubiba-zasoza-pifos.pdf
- http://files.tbcvaldese.org/uploads/1/3/1/3/131398260/5446235.pdf
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- https://cdn.shopify.com/s/files/1/0431/0630/4162/files/encuesta_nacional_de_calidad_de_vida_2020.pdf
- https://cdn.shopify.com/s/files/1/0437/1261/0457/files/krav_maga_training_guide.pdf
- https://cdn.shopify.com/s/files/1/0431/6676/1120/files/rurovutarovowiwidudo.pdf
- https://cdn.shopify.com/s/files/1/0438/4607/4525/files/50270405731.pdf
- https://cdn.shopify.com/s/files/1/0434/4922/1281/files/gumumidunoz.pdf
- https://cdn.shopify.com/s/files/1/0431/9074/7295/files/rimowul.pdf
- https://cdn.shopify.com/s/files/1/0427/6820/3942/files/69685258507.pdf
- https://cdn.shopify.com/s/files/1/0437/1097/2056/files/kefupidovifokasu.pdf
- https://cdn.shopify.com/s/files/1/0434/1674/8188/files/rozog.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/
- http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off00005d4d.bin` `c6efa6040622226bff91e5b299d9090fc7f02f0b34184865ac27f4945c2f0501`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x5D4D	4948 bytes
`font_01_sfnt_off00006e0f.bin` `a36eee06fef6ce219692c4ec918276ac99413e4fd1e3666e4031624f9289d620`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6E0F	1800 bytes
`font_02_sfnt_off0000769c.bin` `170c622b78aea40c72ae81a303bbcb548299ebcf03b00e19f5d08a63bc2d4f97`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x769C	10732 bytes

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