Malicious PDF — malware analysis report

Static analysis result for SHA-256 e421a406a78c7e4f…

MALICIOUS

PDF

53.8 KB Created: 2020-08-14 07:10:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 619c22cb151c178c558b408d9a4771b2 SHA-1: 98872a05974fa6087cf2abbb8c4102343b856473 SHA-256: e421a406a78c7e4f0c994def0b77f1ec7138c1ec5ec96b512b4562c268df3fea
120 Risk Score

Malware Insights

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

The PDF file contains multiple embedded links, with a critical heuristic firing for a malicious redirector. The document body, though heavily obfuscated, contains text suggesting a lure for a 'printable ice cream cone coloring sheet' and includes the malicious URL. The primary attack pattern involves redirecting the user to a malicious site via a seemingly benign document. No scripts were extracted, limiting the analysis of further stages.

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=printable+ice+cream+cone+coloring+sheet
    • http://nuluf.artwithsas.com/uploads/1/3/2/7/132740965/jujudatuferumo_pozive_vukaxizim.pdf
    • http://files.michaelhelquist.com/uploads/1/3/1/1/131163898/371033.pdf
    • http://files.polohouston.com/uploads/1/3/1/6/131606367/261805.pdf
    • https://cdn.shopify.com/s/files/1/0429/7634/6266/files/52448795845.pdf
    • https://cdn.shopify.com/s/files/1/0432/1204/6495/files/gufadalurorikugikat.pdf
    • https://cdn.shopify.com/s/files/1/0437/6471/1575/files/migokubos.pdf
    • https://cdn.shopify.com/s/files/1/0432/7741/8651/files/4152737997.pdf
    • https://cdn.shopify.com/s/files/1/0430/7235/6509/files/neurotransmissor_acetilcolina.pdf
    • https://cdn.shopify.com/s/files/1/0436/1843/5229/files/orphan_2009_cast.pdf
    • https://cdn.shopify.com/s/files/1/0432/7217/5781/files/45174713241.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/49893706483.pdf
    • https://cdn.shopify.com/s/files/1/0431/7514/9719/files/xefijuwinirumeregibaj.pdf
    • https://cdn.shopify.com/s/files/1/0431/6869/4432/files/22361802661.pdf
    • https://cdn.shopify.com/s/files/1/0432/3537/7307/files/zevubutotigagaku.pdf
    • https://cdn.shopify.com/s/files/1/0435/8314/4104/files/zufatipurumawugosop.pdf
    • https://cdn.shopify.com/s/files/1/0429/2981/5705/files/58438298355.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006d12.bin
c8f957006461b1ad5520bd451bd6f1b8e11b5ab865e0a40f62cfad884e682eab		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D12 5140 bytes
font_01_sfnt_off00007e4c.bin
3a9ac77c877e4b19e75bdf3a400b84eae9b63023703286f2bdfb576059b2e692		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7E4C 12352 bytes
font_02_sfnt_off0000a6a8.bin
dd9a388fcb144a6ba51f93f71b1b5f80273f5f386ed315a2c4249d443452b30b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA6A8 16144 bytes
font_03_sfnt_off0000bbaa.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBBAA 4324 bytes

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