Malicious PDF — malware analysis report

Static analysis result for SHA-256 f549f9141571f007…

MALICIOUS

PDF

32.4 KB Created: 2020-08-04 20:39:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 929b0ebebb7d134c72d8222fa1f14e6d SHA-1: 8840ded590f4d85a057bd2b080fba56919557045 SHA-256: f549f9141571f007e4812ebbe3b3cd7af8aa531c3a88d07f95bf144f8a8b6c2c
120 Risk Score

Malware Insights

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

The PDF contains a mass of external links, masquerading as search results for a PDF document. One of these links, https://ttraff.ru/pify?keyword=singer+s+musical+theatre+anthology+baritone+pdf, is identified as a malicious redirector. The document body is heavily obfuscated, but the presence of the malicious redirector and the link farm strongly suggests a phishing or malware distribution attempt.

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.ru/pify?keyword=singer+s+musical+theatre+anthology+baritone+pdf
    • http://files.zonialucero.com/uploads/1/3/2/6/132681325/4042121.pdf
    • http://files.sinclairsdesigns.com/uploads/1/3/2/7/132740525/4301351.pdf
    • http://files.chungmark.com/uploads/1/3/1/8/131871778/xinexeketopiv_suzevuxololow.pdf
    • http://files.grahamstoakes.com/uploads/1/3/1/4/131454264/74002cd9a36d6.pdf
    • https://cdn.shopify.com/s/files/1/0433/6910/3528/files/dixudefigoboduru.pdf
    • https://cdn.shopify.com/s/files/1/0436/8062/8889/files/ripajupidosu.pdf
    • https://cdn.shopify.com/s/files/1/0428/8974/0441/files/fidikazebijupujux.pdf
    • https://cdn.shopify.com/s/files/1/0430/6308/3170/files/67716208414.pdf
    • https://cdn.shopify.com/s/files/1/0437/3171/4202/files/35660702955.pdf
    • https://cdn.shopify.com/s/files/1/0431/5113/0785/files/muwawajafezumadobadik.pdf
    • https://cdn.shopify.com/s/files/1/0427/7354/5116/files/2180174854.pdf
    • https://cdn.shopify.com/s/files/1/0432/3203/4980/files/dimane.pdf
    • https://cdn.shopify.com/s/files/1/0433/3495/9263/files/rusom.pdf
    • https://cdn.shopify.com/s/files/1/0433/8457/0019/files/pixapinakikomifib.pdf
    • https://cdn.shopify.com/s/files/1/0437/4816/3735/files/pujidofuvubefi.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_off000043b7.bin
1d1a2123ceb0f010672341748a03e2e1d5a91ceeb0e30466f2bbae1d1e857dfb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x43B7 5912 bytes
font_01_sfnt_off000057ac.bin
526e6217f61cf62acd26c941403a322a80852899fb28e76a06769e18dc845fdb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x57AC 8388 bytes

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