Malicious PDF — malware analysis report

Static analysis result for SHA-256 b29574028052f54a…

MALICIOUS

PDF

49.0 KB Created: 2020-08-04 23:50:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 77313e6026c7458007ff1b689dc66602 SHA-1: c703ff88d2024d04ab7e4952ea1d4546f41aa446 SHA-256: b29574028052f54adb692a66f8a1237ad65458353dedd1facc37e8584cb5e59b
120 Risk Score

Malware Insights

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

The PDF contains a link that redirects to a known malicious infrastructure, identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains the text 'Enlace quimico ejercicios pdf' and the malicious URL, suggesting a lure to trick users into clicking the link. The PDF also contains a large number of external links, as indicated by the PDF_SEO_LINK_FARM heuristic, likely to obscure the malicious redirector.

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=enlace+quimico+ejercicios+pdf
    • http://ridiripag.carrielwells.com/uploads/1/3/0/8/130874218/repok.pdf
    • http://files.geollect.com/uploads/1/3/0/8/130874526/329c6f5a7.pdf
    • http://files.feralfoxbodies.com/uploads/1/3/0/7/130738565/2957819.pdf
    • https://cdn.shopify.com/s/files/1/0435/8517/5713/files/50217498119.pdf
    • https://cdn.shopify.com/s/files/1/0435/8176/7848/files/85631167564.pdf
    • https://cdn.shopify.com/s/files/1/0435/1236/5211/files/92858626759.pdf
    • https://cdn.shopify.com/s/files/1/0433/8286/6072/files/95822288581.pdf
    • https://cdn.shopify.com/s/files/1/0440/2606/9157/files/nazip.pdf
    • https://cdn.shopify.com/s/files/1/0440/6866/7542/files/67926135349.pdf
    • https://cdn.shopify.com/s/files/1/0427/7341/4055/files/96160199387.pdf
    • https://cdn.shopify.com/s/files/1/0432/3747/4472/files/weludirokewijofewam.pdf
    • https://cdn.shopify.com/s/files/1/0432/4537/1549/files/xijukudu.pdf
    • https://cdn.shopify.com/s/files/1/0436/9501/4056/files/body_parts_in_spanish_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0440/6640/6552/files/vijaxorufosuvu.pdf
    • https://cdn.shopify.com/s/files/1/0436/4409/2566/files/mubupenus.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006911.bin
8bfdaf289df63fb689577667abde5fd09996fb3eb0af5025eb75709cc3ed4663		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6911 5460 bytes
font_01_sfnt_off00007b92.bin
baba5ef17e5bb3a87caf4d437940ff4e549e9f1b2a3b7b0b82f750783ceb06ea		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7B92 11260 bytes
font_02_sfnt_off00009fb6.bin
aad9bc0f36eadc3314e08670b59090120051e308b357201f134af3d0b781b2b0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9FB6 16312 bytes

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