Malicious PDF — malware analysis report

Static analysis result for SHA-256 ebcdcb733b8a3db9…

MALICIOUS

PDF

42.7 KB Created: 2020-08-23 21:58:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f9d7b451510661bf8016e7914f147a6f SHA-1: 697995b03dba90fb807ac7d3fe2b44e09506d6ca SHA-256: ebcdcb733b8a3db9c6eaa8cda85c35d860b31cd35cf02d01a35e256fed658b0b
152 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one identified as a malicious redirector pointing to 'https://ttraff.com/pify?keyword=best+powerpoint+template+slides'. The document body, though partially corrupted, also contains this URL, suggesting a lure to download or view templates. The ML classifier strongly indicated maliciousness, and the presence of a link farm further supports a malicious intent to redirect users to potentially harmful content.

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.com/pify?keyword=best+powerpoint+template+slides
    • http://files.cninc.org/uploads/1/3/2/7/132740479/5324237.pdf
    • http://jezerafut.tradewindsroofingsc.com/uploads/1/3/1/4/131482995/nawasugivelavu_ganesi_gexomapo.pdf
    • http://riziga.lovelocalnashville.com/uploads/1/3/0/9/130969018/3365685.pdf
    • http://files.allaurensamanthaforbes.com/uploads/1/3/0/9/130969509/bakepezam.pdf
    • http://sogosuwa.jenniferborkowskidesigns.com/uploads/1/3/2/6/132681670/gexegisupitavi.pdf
    • https://cdn.shopify.com/s/files/1/0431/5322/7936/files/25348876257.pdf
    • https://cdn.shopify.com/s/files/1/0430/4879/6309/files/letawowapojezed.pdf
    • https://cdn.shopify.com/s/files/1/0434/4230/7239/files/loliburafibuzeneg.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/xixuvedivikeror.pdf
    • https://cdn.shopify.com/s/files/1/0448/9232/3995/files/building_electrical_design_guide.pdf
    • https://cdn.shopify.com/s/files/1/0428/0814/8127/files/50614505326.pdf
    • https://cdn.shopify.com/s/files/1/0431/4356/1376/files/pigasowosapaboxajepifijo.pdf
    • https://cdn.shopify.com/s/files/1/0433/5625/8454/files/gaxewibijutidu.pdf
    • https://cdn.shopify.com/s/files/1/0430/6183/7981/files/past_tense_and_present_tense_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0428/1466/8959/files/shape_coloring_sheets_for_preschoolers.pdf
    • https://cdn.shopify.com/s/files/1/0432/6916/1110/files/59673809689.pdf
    • https://cdn.shopify.com/s/files/1/0429/5131/1513/files/35858834324.pdf
    • https://cdn.shopify.com/s/files/1/0433/3617/1688/files/collocations_with_make.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_off00006aba.bin
d2cdc0435d8cb93452e884954a796770e0c8307cfd02edebeb168c585a7fc621		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6ABA 5248 bytes
font_01_sfnt_off00007c83.bin
2e61ecb1216e758f58bc0515cd6070e6ca805b81517a2fb68c510ea063bbcb58		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7C83 9652 bytes

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