Malicious PDF — malware analysis report

Static analysis result for SHA-256 b5f010ae4fe58886…

MALICIOUS

PDF

42.4 KB Created: 2020-08-14 11:08:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7c481811057ca6b7dee14c5fa56ee99a SHA-1: 3b67881ef69a17cc37292db9f17268109a88cb3c SHA-256: b5f010ae4fe588867304cc0ce605c37745a28b83a25c6dbb47a4be6e52ccb682
120 Risk Score

Malware Insights

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

The PDF contains a link that redirects to malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains text related to sheet music and a URL that appears to be part of a link farm, suggesting a lure to entice users to click. The primary malicious IOC is the redirector URL.

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.com/pify?keyword=audition+la+la+land+violin+sheet+music
    • http://files.ustercollageart.com/uploads/1/3/0/9/130969992/wozonefaz.pdf
    • http://files.stpatsla.org/uploads/1/3/0/7/130775865/da08aa.pdf
    • http://files.crestlinepto.com/uploads/1/3/1/3/131398323/laponajuke-lamajawe.pdf
    • http://files.evandusenportfolio.com/uploads/1/3/1/4/131437633/gowidogudewofu-lodufesuzugip-gexevi-kakusokitikej.pdf
    • http://nonazok.devinjamesbaldwin.com/uploads/1/3/2/8/132814930/a8fa5787.pdf
    • https://cdn.shopify.com/s/files/1/0434/5783/9254/files/58527142700.pdf
    • https://cdn.shopify.com/s/files/1/0433/0071/6694/files/92519341100.pdf
    • https://cdn.shopify.com/s/files/1/0433/7595/2030/files/genetically_modified_food_examples.pdf
    • https://cdn.shopify.com/s/files/1/0449/5376/3999/files/cecilia_software_free.pdf
    • https://cdn.shopify.com/s/files/1/0437/1726/3510/files/dinijinibir.pdf
    • https://cdn.shopify.com/s/files/1/0433/1415/1589/files/40771057046.pdf
    • https://cdn.shopify.com/s/files/1/0430/8451/3440/files/lexukipirefuxejekinawewas.pdf
    • https://cdn.shopify.com/s/files/1/0430/3876/9303/files/43659014890.pdf
    • https://cdn.shopify.com/s/files/1/0431/6073/1799/files/mazizeref.pdf
    • https://cdn.shopify.com/s/files/1/0434/4751/7349/files/54822777398.pdf
    • https://cdn.shopify.com/s/files/1/0433/4839/4143/files/folagadufewoputejaxusif.pdf
    • https://cdn.shopify.com/s/files/1/0430/4489/6917/files/95317273131.pdf
    • https://cdn.shopify.com/s/files/1/0432/1994/3579/files/maxesiji.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_off0000693b.bin
29340b2f4a5bb6eeca189171e51dcba8381b0c383e42890d25e5f61b0116cfbd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x693B 5132 bytes
font_01_sfnt_off00007a84.bin
36b2a2a6d3f4f103f51ad857405ee868be90e772405618714c28aaff79e10f62		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A84 9904 bytes

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