PDF malware analysis — malicious · ee8f1121cb5fab3a

MALICIOUS

PDF

54.6 KB Created: 2020-07-31 05:51:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 030cda730e10d8be0beca98fb9c1428e SHA-1: 8d8b8c94b2bf4fdffb0b29f1557bf1577bce229d SHA-256: ee8f1121cb5fab3aeb6c49e292c4032fbc8de87107c941630da7e39fcda9b8ab

150 Risk Score

Malware Insights

MITRE ATT&CK

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'ttraff.ru'. The document body, though heavily obfuscated, suggests a lure related to a 'Calendario peruano 2020 pdf'. The presence of numerous external PDF links, many hosted on Shopify, indicates a link farm strategy, likely to improve search engine ranking for malicious content or to obscure the ultimate destination. The ML classifier also strongly flagged this PDF as malicious.

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=calendario+peruano+2020+pdf
- http://files.heroesofcolor.org/uploads/1/3/1/4/131453645/tasede_komasojanusomix_netirawirele_bivazeririsob.pdf
- http://files.polishkitchenestevan.ca/uploads/1/3/2/3/132303351/3078664.pdf
- http://files.victoria13gla.ca/uploads/1/3/1/8/131856234/risexupixeva.pdf
- http://files.boiseveteransdayparade.org/uploads/1/3/1/0/131069781/1522185.pdf
- http://files.boiseveteransdayparade.org/uploads/1/3/1/0/131
- https://cdn.shopify.com/s/files/1/0438/1707/4850/files/21542584709.pdf
- https://cdn.shopify.com/s/files/1/0429/9610/5375/files/7141556785.pdf
- https://cdn.shopify.com/s/files/1/0434/0134/7226/files/93815426238.pdf
- https://cdn.shopify.com/s/files/1/0430/8199/0304/files/25142477533.pdf
- https://cdn.shopify.com/s/files/1/0433/7437/9158/files/raseribafopakipe.pdf
- https://cdn.shopify.com/s/files/1/0432/1522/4996/files/wirodadubegipuxeru.pdf
- https://cdn.shopify.com/s/files/1/0433/2303/1720/files/rigutinuvizuzaxajatidok.pdf
- https://cdn.shopify.com/s/files/1/0427/5997/9174/files/jevomasumuwijozupuz.pdf
- https://cdn.shopify.com/s/files/1/0431/4519/9777/files/wufamofodikefebozufumob.pdf
- https://cdn.shopify.com/s/files/1/0430/6799/8362/files/dumatejugarebi.pdf
- https://cdn.shopify.com/s/files/1/0435/1793/5770/files/78878926053.pdf
- https://cdn.shopify.com/s/files/1/0438/8497/0139/files/96369075339.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_off00008dec.bin` `a15bcd84de6d80899861dc425e4fdfd46be340cfad477dffea3dd474edbecc9e`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8DEC	4956 bytes
`font_01_sfnt_off00009ecc.bin` `b05e919cde237fa4079176b8ea72522123776bafa10ca81fe5f41652dd55ad0f`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x9ECC	14648 bytes

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