PDF malware analysis — malicious · e3405526b7c343db

MALICIOUS

PDF

53.9 KB Created: 2020-08-22 20:11:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 12c3d3c7ec77ed698f7b66db4000b897 SHA-1: acd44e342e5746d12209a08e602fdd8d47adfd44 SHA-256: e3405526b7c343dbf4d45e5803d40859fe46f322cf3b082e165fb206538a42e9

152 Risk Score

Malware Insights

MITRE ATT&CK

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

The PDF contains multiple embedded URLs, with one specifically identified as a malicious redirector ('ttraff.cc'). The document body, though heavily obfuscated, contains a reference to the same URL, suggesting a lure to a malicious site. The ML classifier strongly flagged this PDF as malicious, and the presence of a link farm further supports a malicious intent, likely for phishing or malware delivery.

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=estructura+del+texto+argumentativo+pdf
- http://files.acsextracurriculars.com/uploads/1/3/2/6/132683188/89e92b.pdf
- http://files.elpasohousebuying.com/uploads/1/3/1/3/131379276/demesag.pdf
- http://files.wkelearning.com/uploads/1/3/1/4/131407102/bca0c34e.pdf
- http://files.ichoosevbm.com/uploads/1/3/1/4/131483371/rugosevedikama.pdf
- https://cdn.shopify.com/s/files/1/0431/2819/3184/files/27661684062.pdf
- https://cdn.shopify.com/s/files/1/0438/0635/9713/files/79567011663.pdf
- https://cdn.shopify.com/s/files/1/0447/3444/7770/files/java_config_files.pdf
- https://cdn.shopify.com/s/files/1/0432/1991/0813/files/77605941177.pdf
- https://cdn.shopify.com/s/files/1/0428/4294/7750/files/fujonodojamanujugazel.pdf
- https://cdn.shopify.com/s/files/1/0433/3997/2773/files/29091139881.pdf
- https://cdn.shopify.com/s/files/1/0433/0687/7080/files/kusamusa.pdf
- https://cdn.shopify.com/s/files/1/0431/0227/3703/files/40297117832.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_off0000903e.bin` `d20dfb6d072dc055e024344ad8c68d34b51782b817324ecc8f74848f37c4b24c`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x903E	5560 bytes
`font_01_sfnt_off0000a31b.bin` `f778ad9c1415fc4d918d0f1bf3e37d38890e1b56cc5ec28ac65b5e9b9af61a95`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xA31B	11708 bytes

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