Malicious PDF — malware analysis report

Static analysis result for SHA-256 5a46bef12611cf42…

MALICIOUS

PDF

48.0 KB Created: 2020-07-08 19:11:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-09-15
MD5: 50dfba8ee78491929bc2341aa039e2a4 SHA-1: a9e5a266f89606de1f57e76785586b00e7e90660 SHA-256: 5a46bef12611cf42a2e72c199ff84de7280f4d6dd84cc7157953a7dfdaa253e0
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a large number of embedded URLs, many of which point to disposable hosting and appear to be part of a link farm. One critical heuristic identified a link to known malicious redirector infrastructure. The document's primary function seems to be directing users to external content, potentially as a lure or for SEO manipulation, which is a common tactic for distributing malware or phishing content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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/wb?keyword=fssai%20rules%20and%20regulations%202011%20pdf In PDF document text
    • http://files.southlandfamilyclub.com/uploads/1/3/1/3/131379371/e862cb.pdfIn PDF document text
    • http://files.beeffoundation.org/uploads/1/3/1/6/131637034/dadigaguxa.pdfIn PDF document text
    • http://files.eslbioscience.com/uploads/1/3/0/7/130739658/pasanur.pdfIn PDF document text
    • http://files.bingocompany.net/uploads/1/3/1/3/131379612/d2857f2095895b.pdfIn PDF document text
    • http://files.saintalphonsusschool.org/uploads/1/3/1/8/131857071/b41fba5.pdfIn PDF document text
    • http://files.kmphotographyma.com/uploads/1/3/1/4/131407165/1126974.pdfIn PDF document text
    • http://files.squareonegoodsco.com/uploads/1/3/2/8/132815154/tasawaz.pdfIn PDF document text
    • http://files.orangehistory.org/uploads/1/3/1/3/131380998/6a7d3c8e67aa6.pdfIn PDF document text
    • http://files.cheshuntcommunity.com/uploads/1/3/2/3/132303060/4996841.pdfIn PDF document text
    • http://files.seizediem.com/uploads/1/3/1/4/131438741/vewim_gifesimefipotu.pdfIn PDF document text
    • http://files.morroandjasp.com/uploads/1/3/0/9/130969375/wojerodijudo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://pofivel.files.wordpress.com/2020/06/78058745901.pdfIn PDF document text
    • https://fugebetowipo.files.wordpress.com/2020/06/lerozujajotepesipazugujo.pdfIn PDF document text
    • https://zamukesokumo.files.wordpress.com/2020/06/zusosad.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/dosoxuwananeworatimuk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/gofifarigomikidapowokov.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/vuxopikuxoxixu.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006917.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6917 5372 bytes
SHA-256: c3167f3f09b9c2136e9d7fe5b2420c1bd2b4a95676d8401a842c9834f947adb4
font_01_sfnt_off00007b67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7B67 9864 bytes
SHA-256: 9ddffaf29b835a2e0fffb74cac49945ffdf3976ab29bf754f0036e4901fd1edb
font_02_sfnt_off00009d72.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9D72 16164 bytes
SHA-256: 4bd16c8abd39118228c1571b0005d4eb3b3e943e572fd92a2a80cfcb7b749349