Malicious PDF — malware analysis report

Static analysis result for SHA-256 211cdaacab5368e3…

MALICIOUS

PDF

52.8 KB Created: 2020-08-10 13:55:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7b17e3a974bce3c9ff704f2a6c20516b SHA-1: d76c4505831ecff66786de3f78b37b2a7bfc6bda SHA-256: 211cdaacab5368e3916d7666744b6afa099f6c9aff1709455de9201169328d8b
120 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.cc, which is disguised as a link to '6th grade reading comprehension worksheets pdf free'. This heuristic indicates a social engineering attempt to trick the user into visiting a malicious site. The PDF also contains a link farm pointing to multiple Shopify-hosted PDFs, suggesting an attempt to appear legitimate or to distribute further content. No scripts were extracted from this sample.

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=6th+grade+reading+comprehension+worksheets+pdf+free
    • http://files.poweroftheflowers.com/uploads/1/3/2/3/132302787/nufopixefugif.pdf
    • http://files.philiphall3197.com/uploads/1/3/1/3/131380337/pojosifavi.pdf
    • http://files.hjdbc.com.au/uploads/1/3/1/6/131637814/0f91d.pdf
    • http://files.theballstrikers.com/uploads/1/3/1/8/131856771/dogenavusegolabo.pdf
    • https://cdn.shopify.com/s/files/1/0430/0436/2906/files/86559406129.pdf
    • https://cdn.shopify.com/s/files/1/0440/1351/9006/files/kinemokeketodivopijax.pdf
    • https://cdn.shopify.com/s/files/1/0434/5207/2086/files/51998749672.pdf
    • https://cdn.shopify.com/s/files/1/0438/1461/7250/files/25505839510.pdf
    • https://cdn.shopify.com/s/files/1/0429/8879/8111/files/36244717666.pdf
    • https://cdn.shopify.com/s/files/1/0448/0968/3106/files/advantages_and_disadvantages_of_computer_in_education.pdf
    • https://cdn.shopify.com/s/files/1/0437/1123/4197/files/71627344254.pdf
    • https://cdn.shopify.com/s/files/1/0448/1276/3298/files/jpeg_to_ico.pdf
    • https://cdn.shopify.com/s/files/1/0438/8497/0139/files/dakexesilawaruxonowale.pdf
    • https://cdn.shopify.com/s/files/1/0428/3367/4396/files/bapazirivolopikoxukofebe.pdf
    • https://cdn.shopify.com/s/files/1/0432/4294/6715/files/grammar_practice_book_grade_4_harcourt.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/51906755497.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/
    • https://cdn.shopify.com/s/file

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008ca9.bin
eadc7f745b7e746b8f616bf9f631851d6f80e3e07d9185b207deec90e2ef7407		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8CA9 5752 bytes
font_01_sfnt_off0000a01f.bin
a5f4cd9cb46d16579c14906780dcdd9b8bd87148babe56ef226ae6c6bf294176		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA01F 10368 bytes

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