Malicious PDF — malware analysis report

Static analysis result for SHA-256 48e102a0e3eb8e5f…

MALICIOUS

PDF

34.6 KB Created: 2020-08-14 23:06:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a3c4ce236d103e7acfe66e59bca0df27 SHA-1: 6d9e4fc2b806ad7e6ddcd10579f9c53825bb0725 SHA-256: 48e102a0e3eb8e5fe6006c83b9f2a293fb6f1d620d32401085005ea2cf6755b9
150 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 weather report, which is a common lure for phishing or malware delivery. The document body and embedded links strongly suggest a social engineering attempt to direct the user to malicious infrastructure. The ML classifier also flagged this PDF with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.com/pify?keyword=boardman+weather+report
    • http://files.theelementsexchange.com/uploads/1/3/1/4/131437312/4ac5f3a4.pdf
    • http://files.johnlknapp.com/uploads/1/3/2/6/132695546/1917ee0.pdf
    • http://files.curtisnewmanartist.com/uploads/1/3/1/0/131070393/weropatinukuf-zigawepuwele-deruwajivix.pdf
    • http://files.yvonnebuchheim.com/uploads/1/3/2/6/132681910/afe3f1.pdf
    • https://cdn.shopify.com/s/files/1/0429/2499/8819/files/52781235033.pdf
    • https://cdn.shopify.com/s/files/1/0432/2256/5032/files/calendario_escolar_cyl_2020.pdf
    • https://cdn.shopify.com/s/files/1/0439/4817/9611/files/samefuwar.pdf
    • https://cdn.shopify.com/s/files/1/0433/0032/3478/files/xuliletuwezito.pdf
    • https://cdn.shopify.com/s/files/1/0435/9343/3246/files/step_mom_massage.pdf
    • https://cdn.shopify.com/s/files/1/0447/9765/7248/files/sri_rudram_lyrics_in_sanskrit.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/1261535930.pdf
    • https://cdn.shopify.com/s/files/1/0432/0011/8943/files/sexual_and_asexual_reproduction_in_animals.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_off00004c17.bin
2a92b23617dbec2de5127a33427cbc8f62a3e054d708a00c8650df6f850c95c5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4C17 5128 bytes
font_01_sfnt_off00005d67.bin
9d35fae25843c15f52f007d3f6f6862072b06a85406c13a3f8012d7ad90434e6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5D67 9512 bytes

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