Malicious PDF — malware analysis report

Static analysis result for SHA-256 a42266fb4b2d14eb…

MALICIOUS

PDF

86.7 KB Created: 2020-07-10 05:24:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b7e22c36512e7a5b6671d8ddf8b6d31c SHA-1: 40493e00d803bf342a8228d6da8b993d7be5a994 SHA-256: a42266fb4b2d14ebdd9d068c1570c8b640d748a8a1d3944797e7298e21145fa0
150 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by an ML classifier and contains a large number of embedded links. These links point to a link farm designed to redirect users to potentially malicious content, with one prominent redirector being traff.ru. The document's content appears to be a lure, using keywords like 'Desarrollo local definicion pdf' to attract clicks.

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/wb?keyword=desarrollo%20local%20definicion%20pdf
    • http://files.unccaareclinic.com/uploads/1/3/0/7/130740050/sijenesunowute.pdf
    • http://files.gretchendriscoll.com/uploads/1/3/1/1/131164351/cd455178.pdf
    • http://files.myquotesforlife.com/uploads/1/3/0/7/130740438/zizadopujumad.pdf
    • http://files.fittingroomligonier.com/uploads/1/3/0/8/130814672/sodumavasoso_sugenufefigu_tinivotosuna_sezomojodupebe.pdf
    • http://files.trinitypresbyterianharrisonburg.org/uploads/1/3/0/8/130814009/fekiwibob.pdf
    • http://files.cosroscoe.org/uploads/1/3/1/0/131070485/tirujoxun.pdf
    • http://files.myloveall.com/uploads/1/3/1/3/131398234/rotuba.pdf
    • http://files.brazossunrisefarms.com/uploads/1/3/1/6/131637255/8459914.pdf
    • http://files.spartanswolvesfc.com/uploads/1/3/0/7/130775131/fobumon_remenalelep_denavojuda.pdf
    • http://files.carsontidwell.com/uploads/1/3/1/4/131438249/mumiv.pdf
    • http://files.spartanswolvesfc.com/uploads/1/
    • https://fokafogamis.files.wordpress.com/2020/06/64582671491.pdf
    • https://bigoxufogir.files.wordpress.com/2020/07/41246344494.pdf
    • https://kibawof.files.wordpress.com/2020/06/vexovu.pdf
    • https://monanawebo.files.wordpress.com/2020/06/jurefujunatijowawapivesuf.pdf
    • https://kelazuwaler.files.wordpress.com/2020/06/xijipudi.pdf
    • https://vitataf.files.wordpress.com/2020/07/juzulowafubamiwed.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/5903401900.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/bafewemuwidizisaj.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/5578033559.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/tolipokegegami.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/xibirinadinabamagumib.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/51220099535.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/xekosipavejidowusa.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_off00011617.bin
247f7494f4ffa5267fa59da3aa1e39cbe0a8061ba3239e8795589c588b6d7e2c
pdf-font-stream PDF embedded font (sfnt) at offset 0x11617 4856 bytes
font_01_sfnt_off0001269f.bin
e74001d2b785f3ffc3b9a965e5be161aa2c439ef12cd044b6488295eacdcb6f1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1269F 11196 bytes