Malicious PDF — malware analysis report

Static analysis result for SHA-256 b4cedc3ed85f7be8…

MALICIOUS

PDF

37.4 KB Created: 2020-08-10 01:30:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 75b86bdadafacd621833674be6c33c75 SHA-1: feead8a9ff423078afa8e1f532565125ff9c316d SHA-256: b4cedc3ed85f7be87803acdc2d3b50fdd4cc98cfd1d21a5bda3326adee73fe97
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to Shopify domains hosting PDF files. One critical heuristic indicates a PDF link to a known malicious redirector, specifically 'https://ttraff.cc/pify?keyword=horror+stories+in+telugu+pdf+download'. This suggests a link farm or SEO poisoning tactic designed to redirect users to malicious content. The document body, though heavily obfuscated, contains the same redirector URL, reinforcing its malicious intent.

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=horror+stories+in+telugu+pdf+download
    • http://files.operanovacr.com/uploads/1/3/0/9/130969820/leropojevumitiw.pdf
    • http://files.edmonsonvoice.com/uploads/1/3/1/4/131482884/9494188.pdf
    • http://files.beinspiredtodayministries.com/uploads/1/3/1/0/131070911/5875329.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/befuxaj.pdf
    • https://cdn.shopify.com/s/files/1/0428/7479/8247/files/36074336530.pdf
    • https://cdn.shopify.com/s/files/1/0432/8590/5576/files/xewakenozujelakad.pdf
    • https://cdn.shopify.com/s/files/1/0434/7107/7526/files/64573553561.pdf
    • https://cdn.shopify.com/s/files/1/0433/9879/1322/files/kumonumur.pdf
    • https://cdn.shopify.com/s/files/1/0437/8257/0136/files/limejetun.pdf
    • https://cdn.shopify.com/s/files/1/0428/2767/7852/files/tupoxasi.pdf
    • https://cdn.shopify.com/s/files/1/0429/2771/8567/files/67056454488.pdf
    • https://cdn.shopify.com/s/files/1/0431/1144/8729/files/melojolavojolutut.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/646255477.pdf
    • https://cdn.shopify.com/s/files/1/0429/8535/7463/files/abnormal_uterine_bleeding_figo.pdf
    • https://cdn.shopify.com/s/files/1/0430/6527/8625/files/72634117705.pdf
    • https://cdn.shopify.com/s/files/1/0434/4286/4289/files/99342211823.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_off0000545f.bin
e827b3f5c48e89ee95bc02d6eb5f91aa19df90c7f67551c8097afde8a052ef95		 pdf-font-stream PDF embedded font (sfnt) at offset 0x545F 5260 bytes
font_01_sfnt_off00006664.bin
eee34179a32787c6168bce0ac14270b347cc74b600e65f77e2eda479a2cbde73		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6664 10060 bytes

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