Malicious PDF — malware analysis report

Static analysis result for SHA-256 c769498dd138db7d…

MALICIOUS

PDF

52.2 KB Created: 2020-08-07 20:46:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9c45790b0420976e7dd35b56e4e23f16 SHA-1: 4a04dbc253f1ba295893ef86e0c8d64bc4f6715a SHA-256: c769498dd138db7def13f1fb87c533a32a4ee98176118d5d5ca0453ca33b86b9
150 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to external PDFs. One of the primary links, 'https://ttraff.cc/pify?keyword=mito+di+amore+e+psiche+pdf', is flagged as a malicious redirector. The document body, though heavily obfuscated, contains this URL and other Shopify links, suggesting a link farm or SEO poisoning tactic to drive traffic to malicious sites. The ML classifier also strongly indicated maliciousness.

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.cc/pify?keyword=mito+di+amore+e+psiche+pdf
    • http://rujexoji.maryqueenofireland.com/uploads/1/3/0/7/130776760/347da3525c76c0.pdf
    • http://files.wsfishfarm.com/uploads/1/3/0/7/130775242/a09bc.pdf
    • http://files.thelewisartgallery.com/uploads/1/3/2/7/132740838/9044599.pdf
    • https://cdn.shopify.com/s/files/1/0433/4298/7422/files/pelabagemab.pdf
    • https://cdn.shopify.com/s/files/1/0437/0120/7193/files/max_weber_s_theory_of_bureaucracy.pdf
    • https://cdn.shopify.com/s/files/1/0437/3826/7809/files/60568944006.pdf
    • https://cdn.shopify.com/s/files/1/0437/9059/8305/files/pawugiputezokoso.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/vuxevitilikibuvenimomabu.pdf
    • https://cdn.shopify.com/s/files/1/0431/7744/3483/files/buxaforabobaleluwelozepi.pdf
    • https://cdn.shopify.com/s/files/1/0447/4486/7994/files/black_and_decker_hedge_hog.pdf
    • https://cdn.shopify.com/s/files/1/0435/3739/9960/files/waxabuwubuxubifis.pdf
    • https://cdn.shopify.com/s/files/1/0431/5109/8007/files/43803021871.pdf
    • https://cdn.shopify.com/s/files/1/0434/3257/5132/files/38960399120.pdf
    • https://cdn.shopify.com/s/files/1/0437/7929/3338/files/77003353530.pdf
    • https://cdn.shopify.com/s/files/1/0430/8910/0957/files/97621582311.pdf
    • https://cdn.shopify.com/s/files/1/0428/9318/1081/files/soginenumimajixuvi.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_off00008b76.bin
259aed15a645ac7c2d3f8fe81f08ed6104e73ceae1f61bc9c6a6db866a820a36		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8B76 5368 bytes
font_01_sfnt_off00009d98.bin
ffa9b75cefb63c3079e45fc92bf85ccdec28fa2512ac9e192ac52340c10a4f32		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9D98 11432 bytes

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