Malicious PDF — malware analysis report

Static analysis result for SHA-256 eea6fc2073ded278…

MALICIOUS

PDF

42.0 KB Created: 2020-07-29 21:27:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9c84e5b70cdc4f470f345c4b7a9869be SHA-1: a4372a324a5247113a0529d1ae891dd0e2fae45c SHA-256: eea6fc2073ded2788ce8a7a6cfe857d02090317b0570a18ad689bd166924be3f
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains a large number of embedded links, many of which point to external PDF files hosted on various domains. The primary malicious link, 'https://ttraff.ru/pify?keyword=anne+ancelin+sch%25C3%25BCtzenberger+ay+mis+ancestros+pdf', is identified as a malicious redirector. The heuristic 'PDF_SEO_LINK_FARM' indicates a mass of external links designed to manipulate search engine results, likely to distribute malware or phishing content. 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=anne+ancelin+sch%25C3%25BCtzenberger+ay+mis+ancestros+pdf
    • http://files.aimeetanos.com/uploads/1/3/2/7/132740445/solofaxa.pdf
    • http://files.katydunlapyoga.com/uploads/1/3/1/3/131383297/tuketuwesafe-witibowebuw-wuvaxoloxa.pdf
    • http://files.brooksidegundogsllc.com/uploads/1/3/1/0/131070192/zoketezuwegaji.pdf
    • http://files.fit4lyfeathletics.com/uploads/1/3/2/7/132741241/2653128.pdf
    • http://files.fenestraglazing.co.uk/uploads/1/3/0/8/130814234/pomikijorufobufuwez.pdf
    • http://files.fit4l
    • https://cdn.shopify.com/s/files/1/0429/4007/2092/files/jukeze.pdf
    • https://cdn.shopify.com/s/files/1/0440/6696/3621/files/wisisifebodadevit.pdf
    • https://cdn.shopify.com/s/files/1/0434/4633/7703/files/64720648128.pdf
    • https://cdn.shopify.com/s/files/1/0429/4947/6518/files/50710443231.pdf
    • https://cdn.shopify.com/s/files/1/0432/7260/1756/files/2502352996.pdf
    • https://cdn.shopify.com/s/files/1/0435/4523/1515/files/72451442608.pdf
    • https://cdn.shopify.com/s/files/1/0430/8012/2532/files/90513383455.pdf
    • https://cdn.shopify.com/s/files/1/0430/4168/5665/files/80237211216.pdf
    • https://cdn.shopify.com/s/files/1/0436/0473/8206/files/5323541541.pdf
    • https://cdn.shopify.com/s/files/1/0427/6636/8935/files/21156430775.pdf
    • https://cdn.shopify.com/s/files/1/0429/8961/7311/files/23531124648.pdf
    • https://cdn.shopify.com/s/files/1/0431/8386/6007/files/61141473083.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/32867625585.pdf
    • https://cdn.shopify.com/s/files/1/0431/3468/1250/files/51083254965.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.

FilenameKindSourceSize
font_00_sfnt_off00006145.bin
2735ed9ac410002b3eb43f3ccf0385be5c4ee33332cc89ed153cb9525538b04a
pdf-font-stream PDF embedded font (sfnt) at offset 0x6145 5756 bytes
font_01_sfnt_off000074b0.bin
30c799125b913ce4a01feb3d6a63d130c273c8beacf015e2f196d3261f804288
pdf-font-stream PDF embedded font (sfnt) at offset 0x74B0 10752 bytes