Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c343662f390a7a8…

MALICIOUS

PDF

70.0 KB Created: 2020-08-05 12:57:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5e5ca0f07dcfa0870f0f03312dce2d7c SHA-1: e11cd799d3928e274120f06f137e26caf8d845d1 SHA-256: 7c343662f390a7a8e1b9645af658eacb81ecb8f6fc2da00ccc3340d9b8fdd267
120 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with one specifically pointing to a known malicious redirector. The document body, though heavily obfuscated, contains text related to 'probability distribution formulas pdf' and the malicious URL, suggesting a lure to trick users into clicking the link. The presence of a link farm heuristic further supports the malicious intent of redirecting users to external sites.

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=probability+distribution+formulas+pdf
    • http://files.kidsmusicwithmisshoney.com/uploads/1/3/2/8/132814624/buzasekupunidad.pdf
    • http://files.toymigos.com/uploads/1/3/1/8/131856381/61b8c1a.pdf
    • http://ritafeno.emmazenfoundation.org/uploads/1/3/0/7/130776262/1636031.pdf
    • http://bimikeb.pack23scouts.com/uploads/1/3/0/7/130775732/muzadekira.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/31056735454.pdf
    • https://cdn.shopify.com/s/files/1/0431/6528/6564/files/69300717989.pdf
    • https://cdn.shopify.com/s/files/1/0429/9754/7157/files/rofivor.pdf
    • https://cdn.shopify.com/s/files/1/0432/4179/9843/files/34591972681.pdf
    • https://cdn.shopify.com/s/files/1/0437/7473/8586/files/atlas_copco_parts_list.pdf
    • https://cdn.shopify.com/s/files/1/0438/9113/0536/files/obras_de_jorge_basadre.pdf
    • https://cdn.shopify.com/s/files/1/0430/8697/1033/files/basic_guitar_chords_for_beginners.pdf
    • https://cdn.shopify.com/s/files/1/0432/4291/3955/files/37794058822.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/51025654711.pdf
    • https://cdn.shopify.com/s/files/1/0430/4021/1097/files/37868093669.pdf
    • https://cdn.shopify.com/s/files/1/0431/1829/7245/files/41222781145.pdf
    • https://cdn.shopify.com/s/files/1/0434/6737/4758/files/17928322900.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_off0000b108.bin
4ec43b1f27ef3d29c6ed31f20de592cae1cb87d4f185ba897902a9496e5d95cf
pdf-font-stream PDF embedded font (sfnt) at offset 0xB108 5432 bytes
font_01_sfnt_off0000c369.bin
bd03d7c9d066ed7ab201d0c3082956b065ca03663ba6c73699286c12b7af8a3e
pdf-font-stream PDF embedded font (sfnt) at offset 0xC369 15452 bytes
font_02_sfnt_off0000f423.bin
ed015768510e74527d18bce7629334f9a65eeb8f945f70809043912348c3fecf
pdf-font-stream PDF embedded font (sfnt) at offset 0xF423 16524 bytes