Malicious PDF — malware analysis report

Static analysis result for SHA-256 ac1a661c0841b7fd…

MALICIOUS

PDF

91.4 KB Created: 2020-08-07 11:09:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b87a3d557519a3f38deaa6ac0af701cd SHA-1: 6b6ed57bb260fc2415cdfd377aed3e1e3611866c SHA-256: ac1a661c0841b7fd900190b0bc284507606372518fc5d29eeacef8f153c1e66a
128 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link disguised as a worksheet download. The link points to ttraff.com, which is known for redirecting to malicious sites. Additionally, the PDF exhibits characteristics of a link farm, with numerous embedded URLs pointing to external PDFs, likely for SEO manipulation to increase visibility. The presence of a visual download button further supports the lure.

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/wb?keyword=quadratic%20function%20word%20problems%20worksheet%20doc
    • http://dixime.ridgepointdms.com/uploads/1/3/0/9/130969060/34f08455cde.pdf
    • http://files.kimberlywatson33.com/uploads/1/3/2/7/132741709/tugirikofazadisi.pdf
    • http://files.anandayogawithkaren.com.au/uploads/1/3/2/6/132695525/rojejuvulutipowoxef.pdf
    • http://files.pentecostalcchurch.com/uploads/1/3/1/4/131437676/vutotewidu.pdf
    • https://cdn.shopify.com/s/files/1/0430/0944/1953/files/nakotirok.pdf
    • https://cdn.shopify.com/s/files/1/0436/3167/3502/files/pivanomuwezujadap.pdf
    • https://cdn.shopify.com/s/files/1/0427/8072/1311/files/niliramemasuvilabu.pdf
    • https://cdn.shopify.com/s/files/1/0436/0473/8206/files/xazatufakatizubivo.pdf
    • https://cdn.shopify.com/s/files/1/0430/6812/9441/files/energy_fluctuation_in_canonical_ensemble.pdf
    • https://cdn.shopify.com/s/files/1/0431/5476/8021/files/tecnologia_con_enfasis_en_informatica.pdf
    • https://cdn.shopify.com/s/files/1/0428/8030/3270/files/zovarowekisusoxojuf.pdf
    • https://cdn.shopify.com/s/files/1/0440/8714/8709/files/pidavowerovinamizubusa.pdf
    • https://cdn.shopify.com/s/files/1/0435/5702/8001/files/lunefutaw.pdf
    • https://cdn.shopify.com/s/files/1/0432/3724/5086/files/bibapomegunesaweg.pdf
    • https://cdn.shopify.com/s/files/1/0430/7235/6509/files/lavupevavut.pdf
    • https://cdn.shopify.com/s/files/1/0429/9682/6273/files/bolagogidago.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fc0c.bin
a9ad9ad0a96fe26ac6797df49b1e626b392e9366165fda36ca18888fb22e3261		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFC0C 1636 bytes
font_01_sfnt_off0001044a.bin
f0183b04dbe7375f22055b9b208fb37d4e9ba6216b54db8667a7683313d530c8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1044A 5752 bytes
font_02_sfnt_off000117c8.bin
b21cebd553b00c1b0ae7ad2d980b63053b961864276a458262e60387a164ba27		 pdf-font-stream PDF embedded font (sfnt) at offset 0x117C8 16456 bytes
font_03_sfnt_off00014a52.bin
fb10e5badbbf29d6a05184c763452604a6d256f7c208a2bb674868c670b14a78		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14A52 16144 bytes

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