Malicious PDF — malware analysis report

Static analysis result for SHA-256 9807030e8b8accf9…

MALICIOUS

PDF

43.8 KB Created: 2020-08-04 07:42:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4e808a676d962f16126fcff451b06c16 SHA-1: ef3dd1f909556583eb89a0cddd5658ffc46b635f SHA-256: 9807030e8b8accf9b217e55a4d73bdaebfd4a0c3335ffe5c06f270e4bbafcaa1
120 Risk Score

Malware Insights

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

The PDF contains a link farm with 28 external PDF links, many hosted on Shopify. One of these links, https://ttraff.cc/pify?keyword=aleksandar+hemon+knjiga+mojih+zivota+pdf, is identified as a malicious redirector. The document body, though heavily obfuscated, contains references to the book title and the malicious URL, suggesting a lure to download content that ultimately leads to malicious infrastructure. No scripts were extracted from this sample.

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=aleksandar+hemon+knjiga+mojih+zivota+pdf
    • http://files.mauinativenursery.com/uploads/1/3/0/8/130814735/7cbb691d35d.pdf
    • http://files.destinationdelicious.com/uploads/1/3/0/7/130775106/kizakuvorejaxo.pdf
    • http://files.wiregrasssmilesdentist.com/uploads/1/3/2/7/132740880/109a29d8d51c36.pdf
    • https://cdn.shopify.com/s/files/1/0434/0760/5918/files/54281431762.pdf
    • https://cdn.shopify.com/s/files/1/0432/8187/5112/files/rewefesidatevoraru.pdf
    • https://cdn.shopify.com/s/files/1/0431/5385/0528/files/10353491179.pdf
    • https://cdn.shopify.com/s/files/1/0434/3444/2908/files/wanavixapalejilexig.pdf
    • https://cdn.shopify.com/s/files/1/0431/5276/9192/files/wojufogugezinazil.pdf
    • https://cdn.shopify.com/s/files/1/0434/0360/8214/files/581605044.pdf
    • https://cdn.shopify.com/s/files/1/0434/6976/6821/files/pidefozajadi.pdf
    • https://cdn.shopify.com/s/files/1/0438/2146/5757/files/sekunogan.pdf
    • https://cdn.shopify.com/s/files/1/0435/2868/3672/files/kowepopajogogogegoripiru.pdf
    • https://cdn.shopify.com/s/files/1/0433/9168/0673/files/bticino_catalogo_2020.pdf
    • https://cdn.shopify.com/s/files/1/0432/9465/4632/files/96355170510.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_off00006c8c.bin
641dfde5036ebc030d569241c1f8c935d95bc13d7ea78559a5f0692461b90fc3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C8C 5696 bytes
font_01_sfnt_off00007fe0.bin
a22bcccbfaede3fbbe64d65222d8f60298a0dcfdce93029b3b287ca857cc08f4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7FE0 10120 bytes

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