PDF malware analysis — malicious · eab11463f8ed3a24

MALICIOUS

PDF

41.8 KB Created: 2020-08-30 08:23:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: c056bb92f88ad80a520af4c916011316 SHA-1: bbd22a78794816bce500d5dbe6e47da9bcb4b4bb SHA-256: eab11463f8ed3a247f19ef4a6e11df7a6cf744236c2ddb26362fb8c1d012e20e

150 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a critical heuristic firing for a malicious redirector link, specifically pointing to a URL containing 'nj drivers license template'. This URL is the primary IOC. Additionally, the PDF hosts a large number of external links, many pointing to static.usrfiles.com, which is flagged as a link farm. The ML classifier also strongly indicated maliciousness.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 3

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.
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/wix?keyword=nj+drivers+license+template
- https://static.usrfiles.com/ugd/b8c837_7c4bcfd4219a421899f64d8d8e73d6f7.pdf
- https://static.usrfiles.com/ugd/b8c837_7aefd942af7945398a92b6381d1191bc.pdf
- https://static.usrfiles.com/ugd/b8c837_1c8ef90836e44f9cbfe21057f7cca750.pdf
- https://static.usrfiles.com/ugd/b65acf_2b36f426a4d640808a4ea9b507e31161.pdf
- https://static.usrfiles.com/ugd/b8c837_455f551428b740809a72f88b29ea7ddc.pdf
- https://cdn.shopify.com/s/files/1/0430/6498/3703/files/dajotolilu.pdf
- https://cdn.shopify.com/s/files/1/0434/5217/0406/files/free_amharic_children_s_books.pdf
- https://cdn.shopify.com/s/files/1/0437/7827/7525/files/kaplan_series_65.pdf
- https://static.usrfiles.com/ugd/e745be_a8818e9b97d843399ef0b5e9a9d1e1f0.pdf
- https://static.usrfiles.com/ugd/b8c837_ef728de09cd5459fa356c73fb68a9869.pdf
- https://static.usrfiles.com/ugd/ce14f3_4ac7bbffd48a47c8bb9e72aff3eebe1d.pdf
- https://static.usrfiles.com/ugd/b8c837_4d88feceb1d34f07a902010f38dc25c3.pdf
- https://static.usrfiles.com/ugd/b8c837_a91cd6166be744899957383a498e62ea.pdf
- https://static.usrfiles.com/ugd/d775a9_a1b1682765484fa8803eef198de2721a.pdf
- https://static.usrfiles.com/ugd/5cf23b_3d0a468492be488eb5d569109c21b6ff.pdf
- https://static.usrfiles.com/ugd/7dd30d_bed6c038cc6342cda7a5f527bfcce650.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 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off00005878.bin` `87781ee79885ea3a64dca2bf3fbea773254bd524b240fc9fd5953a5f53f4bea7`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x5878	5000 bytes
`font_01_sfnt_off00006960.bin` `f0c7afb8c8985e430fff8cc38e24e8799b2d59f8d82fa110302dd9f6e11fb3cd`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6960	10244 bytes
`font_02_sfnt_off00008c37.bin` `4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8C37	4324 bytes

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