Malicious PDF — malware analysis report

Static analysis result for SHA-256 b7c2d3c38d5991f5…

MALICIOUS

PDF

50.1 KB Created: 2020-08-07 13:05:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 441f66ad0038a29d0e2aac7bd685aa1e SHA-1: ca7992184c4b8fe4f2103315e7bbab7c622a98c7 SHA-256: b7c2d3c38d5991f5f913c2ea733d1da958a8e6304b4386c3f31d26677c803d59
120 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with one URL pointing to a known malicious redirector. The document body, though heavily obfuscated, contains references to 'alphabet worksheets pdf grade 1' and the URL https://ttraff.ru/pify?keyword=alphabet+worksheets+pdf+grade+1, suggesting a lure to disguise malicious redirection. No scripts were extracted, but the PDF structure and embedded links indicate a phishing or redirection attempt.

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.ru/pify?keyword=alphabet+worksheets+pdf+grade+1
    • http://files.homeplacefarmky.org/uploads/1/3/1/4/131438216/libonebejenif-leralozixobadi-bewamofelabera-vukevesi.pdf
    • http://roxipa.hummingbirdwordco.ca/uploads/1/3/2/7/132741555/c4addb42ba.pdf
    • http://files.charlesfarley.com/uploads/1/3/0/7/130775980/419b8058bef57.pdf
    • http://files.patricedworkinart.com/uploads/1/3/0/8/130874101/5474417.pdf
    • http://files.gentlemansmaven.com/uploads/1/3/0/7/130775427/7408630.pdf
    • https://cdn.shopify.com/s/files/1/0440/1594/3845/files/mississippi_state_board_of_cosmetology.pdf
    • https://cdn.shopify.com/s/files/1/0435/2560/3488/files/15634852328.pdf
    • https://cdn.shopify.com/s/files/1/0433/9639/9265/files/61639539715.pdf
    • https://cdn.shopify.com/s/files/1/0439/0230/4408/files/tixetuxeposebitisasikudot.pdf
    • https://cdn.shopify.com/s/files/1/0432/9956/9829/files/vawixukabizul.pdf
    • https://cdn.shopify.com/s/files/1/0431/5761/8850/files/jamimigurakup.pdf
    • https://cdn.shopify.com/s/files/1/0438/5511/8501/files/65635679502.pdf
    • https://cdn.shopify.com/s/files/1/0433/4062/8120/files/vefafezabimuwamunajapigom.pdf
    • https://cdn.shopify.com/s/files/1/0429/2670/2755/files/43748438714.pdf
    • https://cdn.shopify.com/s/files/1/0428/7122/6534/files/how_to_initialize_an_arraylist_in_java.pdf
    • https://cdn.shopify.com/s/files/1/0432/4317/6091/files/sojaxiri.pdf
    • https://cdn.shopify.com/s/files/1/0430/7877/9029/files/79176813222.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_off00007693.bin
6a0dd199cd4a36a31b3e668ae7c773f541e1bff28bd1a8102b5dcc3ccecec025
pdf-font-stream PDF embedded font (sfnt) at offset 0x7693 3364 bytes
font_01_sfnt_off00008298.bin
44f2d729329bfbd429c8617a801adf78e846d871e65b4a56d898c604a04ccebd
pdf-font-stream PDF embedded font (sfnt) at offset 0x8298 5640 bytes
font_02_sfnt_off000095d9.bin
08e7976fb410147dbda602d6d957eb772cc322ef57138183bc465abca63b77b3
pdf-font-stream PDF embedded font (sfnt) at offset 0x95D9 10972 bytes