Malicious PDF — malware analysis report

Static analysis result for SHA-256 2652330bc48cc7b1…

MALICIOUS

PDF

30.0 KB Created: 2020-07-09 16:50:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0e8820337710c3bee5ff0f2079d8b3b5 SHA-1: 355a0ec851f8dd9af0170b9d52fc457254b5ed04 SHA-256: 2652330bc48cc7b16dba3f8417f0aa3a48225a65ad28803d112411877e39ed1d
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains a large number of embedded links, many of which point to a link farm designed to artificially inflate search engine rankings. One of the primary links directs users to a known malicious redirector. The document's content, while appearing to be about free books, is a lure to encourage clicks on these malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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.cc/wb?keyword=constantin%20stanislavski%20libros%20pdf%20gratis
    • http://files.hkcofc.com/uploads/1/3/2/6/132683111/lobojevaresale_jojolurirukekof_nunaduwarutare_rulilik.pdf
    • http://files.oace.co/uploads/1/3/1/3/131381781/parotakime.pdf
    • http://files.hullabaloomusicfestival.com/uploads/1/3/2/7/132740415/zikomigop.pdf
    • http://files.parkhillbowlingclub.com/uploads/1/3/2/8/132815154/4047543.pdf
    • http://files.kldsoccer.com/uploads/1/3/1/4/131452803/1441647.pdf
    • http://files.fiestaomaha.com/uploads/1/3/0/9/130969140/tiwosojejowibixija.pdf
    • http://files.condzellasfarm.com/uploads/1/3/0/9/130969555/97c8dd5b0b0479.pdf
    • http://files.stephaniebershyoga.com/uploads/1/3/1/3/131379371/1049198.pdf
    • http://files.alissweettreats.com/uploads/1/3/1/6/131637701/benijezodog-vonopuvitiwadik-gamivove.pdf
    • https://tosuvodetevo.files.wordpress.com/2020/06/61104398751.pdf
    • https://sobupex.files.wordpress.com/2020/06/kanafuto.pdf
    • https://gofufovaku.files.wordpress.com/2020/07/towabuvepezakul.pdf
    • https://baxemetulej.files.wordpress.com/2020/06/54444230595.pdf
    • https://borenep.files.wordpress.com/2020/07/21425823851.pdf
    • https://pujobat.files.wordpress.com/2020/07/83223798856.pdf
    • https://xuxosasi.files.wordpress.com/2020/07/gemixotad.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/96226605796.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/41841620016.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/sovonuvebapade.pdf

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000648f.bin
308fa0bb56cd84fc6fc4a23c393339461bf37279d8a97d65dc6e53b3afd0b5cf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x648F 5168 bytes

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