Malicious PDF — malware analysis report

Static analysis result for SHA-256 0dfe544f1fbd211a…

MALICIOUS

PDF

43.1 KB Created: 2020-08-22 11:01:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6e09efe4ee2e0ddeb22df2d6219d6e38 SHA-1: 1edea9c3f174d36017ff575d4a821e85b1303d61 SHA-256: 0dfe544f1fbd211a4aa297075c430d2fd183e80846af9e832fe69a43f93fff45
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of embedded links, many of which point to external PDF files, suggesting a link farm or SEO poisoning attempt. One critical heuristic identified a link to a known malicious redirector, indicating a phishing or malware distribution attempt. The document body, though partially corrupted, contains text related to 'recognition certificate template free' and includes the malicious redirector URL, reinforcing the lure.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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.cc/pify?keyword=recognition+certificate+template+free
    • http://wubiv.alexandriatalley.com/uploads/1/3/0/7/130775565/tejexexetanonot_lomudi_lobokojoxo_vatexiwes.pdf
    • http://files.supremexjoy.com/uploads/1/3/0/8/130874240/fuwapariberejisi.pdf
    • http://rijomulos.sarahfieldsmft.com/uploads/1/3/1/3/131398097/gepidufusik.pdf
    • http://files.dentalsleepbasics.com/uploads/1/3/1/4/131406049/kolegana.pdf
    • http://xerovifat.invernesstrampolineclub.com/uploads/1/3/2/6/132695384/gozumudugururolo.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/0485/4426/files/sulezarajov.pdf
    • https://cdn.shopify.com/s/files/1/0429/6992/3740/files/exercicios_para_hernia_de_disco_lombar_fisioterapia.pdf
    • https://cdn.shopify.com/s/files/1/0437/2830/6341/files/test_de_raven_para_imprimir.pdf
    • https://cdn.shopify.com/s/files/1/0436/4324/0606/files/architects_in_chennai.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/mefopevepal.pdf
    • https://cdn.shopify.com/s/files/1/0431/2471/9773/files/83894939761.pdf
    • https://cdn.shopify.com/s/files/1/0429/3623/8236/files/4207757497.pdf
    • https://cdn.shopify.com/s/files/1/0429/9164/8929/files/employment_contract_sample_kenya.pdf
    • https://cdn.shopify.com/s/files/1/0431/1361/1413/files/miranda_sings_net_worth.pdf
    • https://cdn.shopify.com/s/files/1/0434/5567/6568/files/fazinabexoti.pdf
    • https://cdn.shopify.com/s/files/1/0434/3247/6838/files/63334024056.pdf
    • https://cdn.shopify.com/s/files/1/0436/9429/3142/files/31417685946.pdf
    • https://cdn.shopify.com/s/files/1/0433/9548/1750/files/jaxilemujomif.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006c0d.bin
2efc9457672b598b5eb65db848a3439d31e2db0ec7d73a9fe6dacc3969871cf0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C0D 5164 bytes
font_01_sfnt_off00007d8a.bin
61393034fa40c6de492110cbb70556c4441c7c0294a2efd8702ec6ca82589d14		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7D8A 9896 bytes

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