Malicious PDF — malware analysis report

Static analysis result for SHA-256 e64f02a8bcf480d2…

MALICIOUS

PDF

48.4 KB Created: 2020-07-25 05:26:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d09b361e10bd1c6d92df24f8d172992e SHA-1: 9a1f56f2ba6776a76e72825c6dbd619d860115a2 SHA-256: e64f02a8bcf480d2a31480d3c2c9d6788b17a22e7aa2400f901330b4160f0189
152 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to shopify.com domains, but one critical link directs to a known malicious redirector. The ML classifier also strongly indicated maliciousness. The document body appears to be largely obfuscated or contains minimal relevant text, but the presence of the malicious redirector and the link farm suggests an attempt to drive traffic to potentially harmful sites.

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.ru/pify?keyword=android+modal+dialog+activity
    • http://files.tallsycamorecampground.com/uploads/1/3/0/7/130740213/zajafi-pakanawaluzotem-nikunija.pdf
    • http://files.caiweiyi.com/uploads/1/3/1/4/131408204/pilufanedijebigob.pdf
    • http://files.kingdompower.org/uploads/1/3/1/6/131606666/xugipu.pdf
    • https://cdn.shopify.com/s/files/1/0436/3078/8758/files/zuletamarekasab.pdf
    • https://cdn.shopify.com/s/files/1/0440/4104/4118/files/wixejivijobujelimonudimaz.pdf
    • https://cdn.shopify.com/s/files/1/0436/0683/5358/files/14406815647.pdf
    • https://cdn.shopify.com/s/files/1/0434/1281/6039/files/sikopiloja.pdf
    • https://cdn.shopify.com/s/files/1/0431/8180/1629/files/11466877922.pdf
    • https://cdn.shopify.com/s/files/1/0429/4085/8527/files/38178377781.pdf
    • https://cdn.shopify.com/s/files/1/0433/8722/4214/files/56415741198.pdf
    • https://cdn.shopify.com/s/files/1/0433/2938/8699/files/tavasanagujimoz.pdf
    • https://cdn.shopify.com/s/files/1/0434/9168/8610/files/semowafugab.pdf
    • https://cdn.shopify.com/s/files/1/0428/2925/0719/files/fenilepemulo.pdf
    • https://cdn.shopify.com/s/files/1/0438/4922/0256/files/42186082565.pdf
    • https://cdn.shopify.com/s/files/1/0435/6869/3411/files/47967562277.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/83583068491.pdf
    • https://cdn.shopify.com/s/files/1/0429/9423/7593/files/nojijopaviwewoz.pdf
    • https://cdn.shopify.com/s/files/1/0433/4632/9750/files/2102696908.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_off00007638.bin
5476d0432a3a7f60552784e6f15b6dee307ba775b9ecf52a72a1687f7e17fb25		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7638 4904 bytes
font_01_sfnt_off000086c0.bin
93f6e648eaf83d04880453a12bb093939b99fa80cbac46ded7cbb051b2e4186f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x86C0 14228 bytes

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