Malicious PDF — malware analysis report

Static analysis result for SHA-256 40aca45ea3a5ee04…

MALICIOUS

PDF

38.7 KB Created: 2020-07-20 11:08:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a370d00d118d4b513396c6d64e1ea5ae SHA-1: 120c82a3dd5d711a52ece0ed9a8e7e6303dbcd0c SHA-256: 40aca45ea3a5ee047764b5e79622b95979ca0ea46656191d5e7a76b23a7ae57e
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com', which is used to lure users into downloading an APK. Additionally, a PDF link farm heuristic indicates the document is designed to host numerous external links, with the primary example being a Shopify-hosted PDF. The ML classifier also strongly flagged this PDF as malicious. The document body contains garbled text but includes the phrase 'Descargar caracol play apk', reinforcing the lure.

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.com/pify?keyword=descargar+caracol+play+apk
    • http://files.maxiesknitwear.com/uploads/1/3/2/6/132682676/vuwarunofulofewowo.pdf
    • http://files.alexislyras.com/uploads/1/3/2/6/132695919/xoxamofexisunax_nosam_bogafavavawa.pdf
    • http://files.katiemongue.com/uploads/1/3/0/7/130775725/mazekisuxuvirogelu.pdf
    • http://files.tcccmi.com/uploads/1/3/1/4/131438216/xurabe-xixevuxidijo-fuwimudedag-vexobesuxesu.pdf
    • http://files.katiemongue.com/uploads/1/3/0/7/130
    • https://cdn.shopify.com/s/files/1/0430/5059/8562/files/1152867638.pdf
    • https://cdn.shopify.com/s/files/1/0430/1789/6089/files/82723381249.pdf
    • https://cdn.shopify.com/s/files/1/0431/7570/6788/files/bodokadenakefezuxa.pdf
    • https://cdn.shopify.com/s/files/1/0429/9345/1159/files/tetatapezofuralel.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/wojilezufaguxulidumusad.pdf
    • https://wogitopezola.files.wordpress.com/2020/07/kigajukowuziwix.pdf
    • https://motifomimiwa.files.wordpress.com/2020/06/90808125905.pdf
    • https://puxeter.files.wordpress.com/2020/06/98748502945.pdf
    • https://cdn.shopify.com/s/files/1/0431/7213/5074/files/74539105374.pdf
    • https://cdn.shopify.com/s/files/1/0438/4745/0789/files/kugazobevik.pdf
    • https://cdn.shopify.com/s/files/1/0430/2602/2557/files/36647896840.pdf
    • https://cdn.shopify.com/s/files/1/0431/5008/2202/files/82182332129.pdf
    • https://cdn.shopify.com/s/files/1/0430/0016/8597/files/segaxaros.pdf
    • https://cdn.shopify.com/s/files/1/0434/1805/8901/files/rifaxove.pdf
    • https://cdn.shopify.com/s/files/1/0430/1419/3311/files/lojafutam.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_off00005956.bin
a014b69c448f4ded40f7c0408a0dddb0e77aed90dc8cc85ce14a84fc1e8b06fb
pdf-font-stream PDF embedded font (sfnt) at offset 0x5956 4820 bytes
font_01_sfnt_off000069da.bin
cdeef7e79a39d0dcf7fcc9c99ccd7bc542707cdb99f57b2ac2489c1e287f7909
pdf-font-stream PDF embedded font (sfnt) at offset 0x69DA 10500 bytes