Malicious PDF — malware analysis report

Static analysis result for SHA-256 ca342830ddaa7a6e…

MALICIOUS

PDF

40.4 KB Created: 2020-08-13 23:39:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b0340574f24276fd4985e0364fb58ae1 SHA-1: 7aa3e9286fdd8148a80c5d3b5451511230f527d2 SHA-256: ca342830ddaa7a6ebff93dbe761770831da822fbbe7837b172bda8415f201902
150 Risk Score

Malware Insights

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

The PDF contains a link farm and a specific malicious redirector URL, indicating a phishing or scam attempt. The document body, though heavily obfuscated, contains text related to 'Android 9 pie update pixel 2', reinforcing the lure. The primary malicious IOC is the redirector URL, which is designed to lead the user to a malicious site.

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=android+9+pie+update+pixel+2
    • http://files.bonneygirlphotography.com/uploads/1/3/1/3/131381332/terubobo_bubenopujom_fivolal_nosarugirawavos.pdf
    • http://files.liniger.com/uploads/1/3/1/3/131398143/aed2a304b45.pdf
    • http://files.sanramonvalleypt.com/uploads/1/3/1/0/131069824/6318751.pdf
    • https://cdn.shopify.com/s/files/1/0433/7047/9772/files/mcaer_pg_cet_result_2020_download.pdf
    • https://cdn.shopify.com/s/files/1/0432/0811/4340/files/33935928993.pdf
    • https://cdn.shopify.com/s/files/1/0437/5497/9477/files/centrifugal_and_axial_flow_pumps.pdf
    • https://cdn.shopify.com/s/files/1/0433/7808/1959/files/baruzokave.pdf
    • https://cdn.shopify.com/s/files/1/0438/5210/3842/files/business_environment_book_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0437/9148/3042/files/bipipofug.pdf
    • https://cdn.shopify.com/s/files/1/0433/4131/6264/files/wisanuguf.pdf
    • https://cdn.shopify.com/s/files/1/0437/1959/0040/files/disjunctive_syllogism_examples.pdf
    • https://cdn.shopify.com/s/files/1/0438/8998/3643/files/sda_church_manual.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_off0000601d.bin
e04aa7d959d9033202d2bd1931648baa42acb89276c326a862a8ee4ceca1d7bd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x601D 5120 bytes
font_01_sfnt_off00007194.bin
231d786047f0bcf4ad1087945d6c0479a89972a6ee4bbd94b53d62d328c4c4ef		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7194 10368 bytes

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