PDF malware analysis — malicious · 4980fccc1c2d6b0e

MALICIOUS

PDF

42.8 KB Created: 2020-08-21 22:19:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: bbc8d7dbb564f3ffb33ef8ca4df8b20c SHA-1: 0088c454d0266297547f4b480a9c858c655e3148 SHA-256: 4980fccc1c2d6b0e3147bbc44f4e37270281c7db29ce1214446fd2505d759e5b

150 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains numerous embedded links, identified as a link farm, with a primary malicious redirector pointing to 'https://ttraff.ru/pify?keyword=secret+santa+form+answers'. The document body, though heavily obfuscated, also contains this URL and references 'secret santa form answers', suggesting a lure to a malicious site. The ML classifier strongly flagged this PDF as malicious, supporting the assessment of a malicious redirector.

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/pify?keyword=secret+santa+form+answers
- http://files.wroeh.org/uploads/1/3/1/6/131606343/xiwute-fuwezi.pdf
- http://files.behindthebadgenm.org/uploads/1/3/0/7/130775342/diponosidozodewut.pdf
- http://luwebot.chilimacshack.com/uploads/1/3/1/4/131409090/soxupagomodusaje.pdf
- http://texusoz.msbellmlis.com/uploads/1/3/1/6/131607240/zeseg_piwajenelawej_tofodo_lilageseseligug.pdf
- http://files.newqha.org/uploads/1/3/0/7/130776769/49b615.pdf
- https://cdn.shopify.com/s/files/1/0434/2287/5797/files/wujekudesadido.pdf
- https://cdn.shopify.com/s/files/1/0430/4424/1562/files/cuales_son_los_generos_periodisticos.pdf
- https://cdn.shopify.com/s/files/1/0433/0687/7080/files/27947700243.pdf
- https://cdn.shopify.com/s/files/1/0430/5823/3493/files/birdhouse_plans.pdf
- https://cdn.shopify.com/s/files/1/0432/0028/2783/files/90139715434.pdf
- https://cdn.shopify.com/s/files/1/0429/5652/1631/files/44889214321.pdf
- https://cdn.shopify.com/s/files/1/0428/2312/3100/files/texudunarojebotimapu.pdf
- https://cdn.shopify.com/s/files/1/0429/6700/7386/files/besutoga.pdf
- https://cdn.shopify.com/s/files/1/0427/6885/9303/files/85021314401.pdf
- https://cdn.shopify.com/s/files/1/0429/9443/4202/files/jufefazimejifarux.pdf
- https://cdn.shopify.com/s/files/1/0431/5188/4445/files/jarebokadobazobi.pdf
- https://cdn.shopify.com/s/files/1/0430/5970/8058/files/83309028646.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_off00006a89.bin` `9c984695b6f8047873b9c6122b089edb880a19ac213148a242acbaf928664b8c`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6A89	5188 bytes
`font_01_sfnt_off00007c23.bin` `27631e5cc135af065d3c820ce1bf291b9a45fecbb50b5611502b73ed2589df31`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7C23	10060 bytes

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