Malicious PDF — malware analysis report

Static analysis result for SHA-256 acf63741eb54c5a9…

MALICIOUS

PDF

33.5 KB Created: 2020-08-11 08:42:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 72af532c7453ab677d3d4db8a5ebc4ef SHA-1: acb660a2636231296f35ea4bdd55f9f14a4abe3d SHA-256: acf63741eb54c5a97700792f5d1340e9ab822d37201846ef631afe59e3975e80
120 Risk Score

Malware Insights

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

The PDF contains a mass of external links, including a redirector to a URL associated with malicious activity. The document body, though corrupted, suggests a lure related to 'zimsec a level economics notes pdf'. The primary malicious IOC is the redirector URL, which likely leads to a further stage of the attack. 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=zimsec+a+level+economics+notes+pdf
    • http://wabuzoj.constancebretes.com/uploads/1/3/0/9/130969352/8208999c44fc3.pdf
    • http://kisawe.michaelvincentportfolio.com/uploads/1/3/2/3/132303035/e311dcc032eb5b8.pdf
    • http://files.amgfashions.com/uploads/1/3/0/9/130970009/movuvoditixurulas.pdf
    • http://files.alexandraprimaryschool.com/uploads/1/3/2/3/132303170/kiroxilowazo-doxumi-ziwuboteligoza.pdf
    • http://tijuned.cassidyraegaiter.com/uploads/1/3/2/7/132710657/gupixusukivujanajanu.pdf
    • https://cdn.shopify.com/s/files/1/0429/8843/7655/files/12166748763.pdf
    • https://cdn.shopify.com/s/files/1/0432/4796/0232/files/itextsharp_to_html.pdf
    • https://cdn.shopify.com/s/files/1/0448/4897/1938/files/ruvigafujuzizemukufixose.pdf
    • https://cdn.shopify.com/s/files/1/0432/5395/6758/files/45586129527.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/kofuka.pdf
    • https://cdn.shopify.com/s/files/1/0435/4785/2959/files/kokejosewedaxob.pdf
    • https://cdn.shopify.com/s/files/1/0430/9227/9445/files/75486321427.pdf
    • https://cdn.shopify.com/s/files/1/0430/9201/7305/files/buddypress_tutorial.pdf
    • https://cdn.shopify.com/s/files/1/0433/8168/6439/files/jointer_machine.pdf
    • https://cdn.shopify.com/s/files/1/0435/8003/1135/files/28851860106.pdf
    • https://cdn.shopify.com/s/files/1/0450/7874/1155/files/bernina_express_timetable.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_off00004662.bin
e0dc71efcde06fa367bb47571a79d76de905fc78961d5c5364b6f2e57e9b670f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4662 5220 bytes
font_01_sfnt_off00005819.bin
dad73ffed86176afc619abb6ac61968d52b0a4096ea46caf1576f874ce70f956		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5819 9648 bytes

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