Malicious PDF — malware analysis report

Static analysis result for SHA-256 f5fbbcd08991a25f…

MALICIOUS

PDF

40.0 KB Created: 2020-08-22 19:38:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 52e94d8cbc0d2857fdf1f566747ebfc8 SHA-1: 5b424f280e24090b08c5a0942318d9ed3b39a063 SHA-256: f5fbbcd08991a25f6ca15be32f98a2784113f60e2c8763c81aa622b3b422af68
120 Risk Score

Malware Insights

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

The PDF contains a prominent link that redirects to a malicious URL, identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains text related to 'rrb mumbai alp answer key direct link' and the malicious redirector URL. The PDF_SEO_LINK_FARM heuristic indicates the presence of numerous external links, suggesting a tactic to distribute malicious content or SEO manipulation.

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=rrb+mumbai+alp+answer+key+direct+link
    • http://files.fumcrutherfordton.org/uploads/1/3/2/6/132695663/kozesekonib_wikuko_xazitodugifilog.pdf
    • https://cdn.shopify.com/s/files/1/0427/9474/6023/files/lejujiwajopiwuzidafa.pdf
    • https://cdn.shopify.com/s/files/1/0433/3826/8827/files/15550084219.pdf
    • https://cdn.shopify.com/s/files/1/0435/3346/7808/files/laporan_kasus_orchitis.pdf
    • https://cdn.shopify.com/s/files/1/0431/3264/9636/files/10361299489.pdf
    • https://cdn.shopify.com/s/files/1/0437/8850/1143/files/gegofojafimorupamux.pdf
    • https://cdn.shopify.com/s/files/1/0441/4429/6088/files/ludiposabirufisefa.pdf
    • https://cdn.shopify.com/s/files/1/0433/6248/4383/files/nobid.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/69865881622.pdf
    • https://cdn.shopify.com/s/files/1/0427/4647/8758/files/28605337278.pdf
    • https://cdn.shopify.com/s/files/1/0429/9299/2410/files/juxanod.pdf
    • https://cdn.shopify.com/s/files/1/0428/4953/4111/files/zasupesiwa.pdf
    • https://cdn.shopify.com/s/files/1/0430/5059/8562/files/burrhus_skinner.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_off00005e0f.bin
d47ae5ded81ed7a362f679f62b04c9ba62df5c03ce8c76d805757c87e11bb3f8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5E0F 5624 bytes
font_01_sfnt_off0000711c.bin
6c049e6c3553b96e5618f2108711dafbc223b504e39446a76bdf384b0eddc4d8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x711C 9960 bytes

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