Malicious PDF — malware analysis report

Static analysis result for SHA-256 1b04f7d2d1fdac9a…

MALICIOUS

PDF

51.0 KB Created: 2020-09-16 22:47:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d3f546c2bcad54f80240fc7073107ec0 SHA-1: 9a2429b6a9c07e84fe76b78ee16eb55ce74114bd SHA-256: 1b04f7d2d1fdac9ac9702406f10f82e24786c44819cd4247243ecfb58ac8b8b2
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a large number of embedded links, many of which point to a link farm designed to host numerous PDF files. One of the primary links, 'https://ttraff.club/wix?keyword=why+the+rich+are+getting+richer+robert+t.+kiyosaki+pdf', is identified as a malicious redirector. This suggests the document's purpose is to lure users to malicious infrastructure by presenting itself as a financial document.

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.club/wix?keyword=why+the+rich+are+getting+richer+robert+t.+kiyosaki+pdf
    • https://e93beb5e-46ed-4091-a7c6-223cfdd67a8a.filesusr.com/ugd/d90490_72a92638ff3547789839f80a66c1cf67.pdf?index=true
    • https://6a649b27-b942-4f94-aa83-b4601f1139e4.filesusr.com/ugd/09c3c7_1cdb392ed3344c8fa199d6afb6eff540.pdf?index=true
    • https://3a04a79f-abb7-4102-96d9-dbb28351161c.filesusr.com/ugd/d162e3_31fa20ebe5fe4fd49d8ac60a2b93f6f7.pdf?index=true
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/98572357872.pdf
    • https://cdn.shopify.com/s/files/1/0435/3540/1111/files/gabidudolezirovepoxufi.pdf
    • https://cdn.shopify.com/s/files/1/0431/3110/9540/files/pekovofefasejosuna.pdf
    • https://cdn.shopify.com/s/files/1/0433/2175/3758/files/81817929625.pdf
    • https://cdn.shopify.com/s/files/1/0431/2684/9700/files/52717676784.pdf
    • https://cdn.shopify.com/s/files/1/0435/9674/2815/files/73767287964.pdf
    • https://cdn.shopify.com/s/files/1/0433/5537/3720/files/4037997073.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/89349082521.pdf
    • https://cdn.shopify.com/s/files/1/0432/7335/5424/files/bulimoferelejifomobawedi.pdf
    • https://a681fce0-9de4-49d5-8bdc-b992caac3c6b.filesusr.com/ugd/3cb679_3ea9287df29e4c2fb9fe941479c4f977.pdf?index=true
    • https://ee14d8e0-97f0-4ef5-b292-187a25952325.filesusr.com/ugd/2eff39_fae18b6172a843f693f6600e62ba5636.pdf?index=true
    • https://13a57a30-54ee-480c-b3e0-f65917101336.filesusr.com/ugd/895bef_c50da76be15f4bcbad649bb8cb37f80e.pdf?index=true
    • 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000755b.bin
5fb187b4fef33fa22519e9a0c91bbede7ba51f0d0c367b51d13280aa2840df38		 pdf-font-stream PDF embedded font (sfnt) at offset 0x755B 5524 bytes
font_01_sfnt_off0000882a.bin
b7f852fa7998ff58462cc5b44c7385ff068ea551be918e1d5e8949a08b1088e7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x882A 12316 bytes
font_02_sfnt_off0000b0d9.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB0D9 4324 bytes

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