Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ca6c9aac5b73a70…

MALICIOUS

PDF

48.0 KB Created: 2020-08-07 21:00:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d23b7f907051f8da7f9ee2d34d116bda SHA-1: f96fadab0f09e63925d1cae6dd57e63db7778f00 SHA-256: 9ca6c9aac5b73a70ba145a56c4c971401409a9e9be8c20dd2ab6212e409369c4
152 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with a critical heuristic firing for a malicious redirector. The primary malicious URL identified is https://ttraff.com/pify?keyword=buddhist+teachings+book+pdf, which is likely used to redirect users to malicious content. The document body, though heavily obfuscated, contains references to 'Buddhist teachings book pdf' and the wkhtmltopdf tool, suggesting a lure to disguise the malicious intent. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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=buddhist+teachings+book+pdf
    • http://xofeke.cheshireneuroactive.org/uploads/1/3/0/8/130813821/pebepidejadivok_nidike_jofiz.pdf
    • http://files.brendawehle.com/uploads/1/3/1/6/131637853/15e49cb2fe9.pdf
    • http://files.qmprecords.com/uploads/1/3/0/7/130776206/22c6f523aaa.pdf
    • http://files.independentlutherandiocese.com/uploads/1/3/1/0/131070845/9a6692eaa7.pdf
    • http://files.simplyserene.com.au/uploads/1/3/2/7/132740338/fobez-masiwutexe-mizeboba.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/borutazaweluv.pdf
    • https://cdn.shopify.com/s/files/1/0434/5570/9341/files/34173290245.pdf
    • https://cdn.shopify.com/s/files/1/0433/4891/8440/files/vigorofuzorix.pdf
    • https://cdn.shopify.com/s/files/1/0428/7063/6710/files/meremusakilononox.pdf
    • https://cdn.shopify.com/s/files/1/0438/1881/1552/files/exercice_corrig_sur_les_amplificateurs_oprationnel.pdf
    • https://cdn.shopify.com/s/files/1/0434/5928/1061/files/iowa_biennial_report.pdf
    • https://cdn.shopify.com/s/files/1/0434/1540/4695/files/41458254099.pdf
    • https://cdn.shopify.com/s/files/1/0433/2997/8526/files/puwanox.pdf
    • https://cdn.shopify.com/s/files/1/0432/3658/9730/files/21726600417.pdf
    • https://cdn.shopify.com/s/files/1/0430/6645/8265/files/parent_portal_cps.pdf
    • https://cdn.shopify.com/s/files/1/0431/6738/3713/files/fivewojofivotimikeriveri.pdf
    • https://cdn.shopify.com/s/files/1/0429/6255/0940/files/9983825509.pdf
    • https://cdn.shopify.com/s/files/1/0429/7474/0639/files/35907854433.pdf
    • https://cdn.shopify.com/s/files/1/0439/5106/3195/files/jewuk.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_off00007ddf.bin
49ca4a5e2ad60028cd034bf3e12be224ad6a459db197f68989efec1d40ff9ae5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7DDF 5544 bytes
font_01_sfnt_off000090c0.bin
95eaf19b3b4c68d21fa99d899c7dde88008eda8dbf84af19be731b40a92eb88f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x90C0 10060 bytes

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