Malicious PDF — malware analysis report

Static analysis result for SHA-256 8fdc994fb327399b…

MALICIOUS

PDF

44.5 KB Created: 2020-08-20 21:26:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f83081c7acd82d798cda0257d8aada86 SHA-1: 977b7cde8d62c370bda9ff020c82068834992a12 SHA-256: 8fdc994fb327399bf56783b0347b96ca82c68ed460a1917c3458d251a3a14fe7
128 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a call-to-action button and embeds numerous links, including one to a known malicious redirector. The primary lure appears to be an 'Adobe flash player installer free' disguised as a PDF document. The redirector URL `https://ttraff.com/pify?keyword=adobe+flash+player+11.+2+installer+free` likely leads to the download of a second-stage payload. The presence of a link farm suggests an attempt to improve search engine ranking for malicious download lures.

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.com/pify?keyword=adobe+flash+player+11.+2+installer+free
    • http://furiwuga.vibrantlife101.com/uploads/1/3/1/4/131407089/7793969313.pdf
    • http://files.williamsburgnaz.org/uploads/1/3/1/4/131410479/7335e5fc7bfdae2.pdf
    • https://cdn.shopify.com/s/files/1/0437/0841/6168/files/50851918956.pdf
    • https://cdn.shopify.com/s/files/1/0436/5297/2697/files/56838992499.pdf
    • https://cdn.shopify.com/s/files/1/0435/7668/8798/files/47715015681.pdf
    • https://cdn.shopify.com/s/files/1/0432/8315/3056/files/new_functional_training_for_sports_2nd_edition_download.pdf
    • https://cdn.shopify.com/s/files/1/0427/4647/8759/files/antimicrobial_peptides_of_multicellular_organisms.pdf
    • https://cdn.shopify.com/s/files/1/0432/6231/2616/files/latest_android_version_oreo_8.pdf
    • https://cdn.shopify.com/s/files/1/0434/7500/9686/files/28417691340.pdf
    • https://cdn.shopify.com/s/files/1/0437/4013/5575/files/apache_poi_create_example.pdf
    • https://cdn.shopify.com/s/files/1/0432/2073/0020/files/togugimigo.pdf
    • https://cdn.shopify.com/s/files/1/0434/5767/5431/files/dell_2330dn_driver.pdf
    • https://cdn.shopify.com/s/files/1/0434/7455/0950/files/mifaxizefomewaja.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_off00006e44.bin
8eca4f5a78843327267b94b28fd072d3446894a91d898a060fc6b5163c3df949		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E44 5576 bytes
font_01_sfnt_off0000813b.bin
24ccf2f888031b982a171e6cec820656a31adbe5012a0739d443d7ceb96bbf96		 pdf-font-stream PDF embedded font (sfnt) at offset 0x813B 10772 bytes

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