PDF malware analysis — malicious · fb470c9c1925c6bf

MALICIOUS

PDF

40.9 KB Created: 2020-09-02 01:30:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: cac63aeb0bb8f30d55efae379adfd3f1 SHA-1: a508cd3a7e20e351010cd543490f5ece176e2628 SHA-256: fb470c9c1925c6bf421e3e2d13f7a10becd1ffa4e3b20ef16a968dcf313b4ed8

152 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a significant number of embedded links, with one identified as a known malicious redirector. The ML classifier also flagged this PDF as malicious. The presence of a link farm suggests an attempt to distribute malicious content or conduct phishing operations. No scripts were extracted from this sample.

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/wix?keyword=boy+games++free
- https://static.usrfiles.com/ugd/0a593f_529f073cbada4ad48370837d6c92c0a9.pdf
- https://static.usrfiles.com/ugd/74c34a_b0d48e5e0e554c22b1b0ab88951e2cce.pdf
- https://static.usrfiles.com/ugd/7d1dc9_8a73b8712d7b48e3b7c19b19a2b91ad8.pdf
- https://static.usrfiles.com/ugd/3e9e83_abd394a734074b1e84b0fabe07bc3199.pdf
- https://static.usrfiles.com/ugd/2f3216_264a11cd802e497183fbfd1436b0db1d.pdf
- https://static.usrfiles.com/ugd/451a43_2bb553026f2949378d35084836dc7147.pdf
- https://static.usrfiles.com/ugd/1b7c00_4fd26ba600b1470cb27927af2874686f.pdf
- https://static.usrfiles.com/ugd/906e9f_652cbbcd785b4c7980298747b087fd01.pdf
- https://static.usrfiles.com/ugd/9421c8_684f8833aed2448190a86a498e010c90.pdf
- https://cdn.shopify.com/s/files/1/0434/8670/7876/files/70605882884.pdf
- https://cdn.shopify.com/s/files/1/0436/1843/5229/files/cast_of_magic_city.pdf
- https://cdn.shopify.com/s/files/1/0429/5272/0543/files/88675909572.pdf
- https://cdn.shopify.com/s/files/1/0435/3484/4059/files/skyrim_se_bashed_patch_guide.pdf
- https://cdn.shopify.com/s/files/1/0437/1028/3931/files/finney_demana_waits_kennedy_calculus_ap_edition.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_off000061cf.bin` `1e75c8fa114d2dd7b94a732f2c301ddbc3c1bd1fdee289bbb9f75579ab8174e8`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x61CF	5204 bytes
`font_01_sfnt_off00007385.bin` `9d2152e3c9c218608e08eb9d166bfe0a30ed4d693cbee7137a652b048059974a`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7385	10440 bytes

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