PDF malware analysis — malicious · 9674fb28b98b445f

MALICIOUS

PDF

46.2 KB Created: 2020-08-23 04:30:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: ea24cadb79c5075f6cf9b03b69ccba9c SHA-1: 22192f08038f5d2eedcd9dc368e41feb513774fb SHA-256: 9674fb28b98b445f0c4488960638489c4606a4fb0d1e7093ec870d04e082d9a1

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains embedded links, with one specifically pointing to a known malicious redirector at 'https://ttraff.ru/pify?keyword=angular+2+material+form+control'. The document body, though heavily obfuscated, also contains this URL, suggesting a lure to a malicious site. The presence of a large number of external PDF links, many hosted on Shopify, indicates a link farm strategy. The ML classifier 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=angular+2+material+form+control
- http://files.avotova.net/uploads/1/3/1/3/131383825/xiripesep.pdf
- https://cdn.shopify.com/s/files/1/0434/9778/3458/files/74496903287.pdf
- https://cdn.shopify.com/s/files/1/0437/5543/8241/files/pdf_books_marketing_management.pdf
- https://cdn.shopify.com/s/files/1/0434/5410/3713/files/jemesikuvururaxojapiw.pdf
- https://cdn.shopify.com/s/files/1/0440/6994/5509/files/82272619512.pdf
- https://cdn.shopify.com/s/files/1/0431/5080/3099/files/mikegilonipilojuruva.pdf
- https://cdn.shopify.com/s/files/1/0432/2469/4942/files/free_cd_ripper.pdf
- https://cdn.shopify.com/s/files/1/0428/9586/8057/files/jotudugamadurorivokawov.pdf
- https://cdn.shopify.com/s/files/1/0432/3151/0690/files/jepuluf.pdf
- https://cdn.shopify.com/s/files/1/0429/6438/5951/files/50897206814.pdf
- https://cdn.shopify.com/s/files/1/0431/3343/6066/files/78654829668.pdf
- https://cdn.shopify.com/s/files/1/0439/4654/1211/files/74774637242.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_off00006a00.bin` `43c1ddae1a11d0e03b03cb436d8c9ec15c4bf1f3edc64a1220e8932e74473284`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6A00	5144 bytes
`font_01_sfnt_off00007b67.bin` `98ccbbe5fe32fdc9b94498130a4a02c0a9e13bed3af7d1c026123ded50c00c20`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7B67	15464 bytes

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