Malicious PDF — malware analysis report

Static analysis result for SHA-256 58416c3d9632f74b…

MALICIOUS

PDF

41.4 KB Created: 2020-08-21 08:11:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fdd61f2510ecc0baccb97aa78d3d0a01 SHA-1: fc3264922951fe9a16b91620f90193b124d1eb7c SHA-256: 58416c3d9632f74b83287f1c87006b26e22be3b3028ea45ffe8771b94df30056
128 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one identified as a malicious redirector. The document body, though heavily obfuscated, contains a URL that matches the malicious redirector. This suggests the primary goal is to redirect the user to a potentially harmful website. The presence of a link farm further supports a malicious intent to distribute links.

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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.ru/pify?keyword=algebra+nation+answer+key+section+10
    • http://bulikito.bangsarsouth-properties.com/uploads/1/3/2/6/132680949/6989950.pdf
    • http://vekubo.nanoredbiotechnology.com/uploads/1/3/0/7/130738943/lomudukogil.pdf
    • http://nalumakul.800steps.com/uploads/1/3/0/8/130874030/mufajal-gidadufep-nixunizo-dijarefufafi.pdf
    • https://cdn.shopify.com/s/files/1/0429/6874/4099/files/m._a._p_full_form_hotel.pdf
    • https://cdn.shopify.com/s/files/1/0433/6828/4319/files/43964893642.pdf
    • https://cdn.shopify.com/s/files/1/0431/4356/1384/files/your_brain_on_love.pdf
    • https://cdn.shopify.com/s/files/1/0433/8194/8567/files/linuwakixevizudur.pdf
    • https://cdn.shopify.com/s/files/1/0433/4632/9750/files/fafezoferunizutaf.pdf
    • https://cdn.shopify.com/s/files/1/0432/0509/9675/files/ntp_ip_address.pdf
    • https://cdn.shopify.com/s/files/1/0431/0702/5056/files/fejasuzi.pdf
    • https://cdn.shopify.com/s/files/1/0434/6173/8662/files/bmw_118i_2020_manual.pdf
    • https://cdn.shopify.com/s/files/1/0427/7505/2454/files/automatic_lawn_mower.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_off000061b9.bin
f243f4c3420582d16d74fe2d65ac5aa9bdb4ee20bd78d038c72ecedb0bac577b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x61B9 5548 bytes
font_01_sfnt_off000074c2.bin
526a563f9eb86fbb94c2b60d5be1331374b200c66c7f80f1bbad3c1d3f17323d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x74C2 10608 bytes

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