Malicious PDF — malware analysis report

Static analysis result for SHA-256 c92e8cf0c119ae91…

MALICIOUS

PDF

44.0 KB Created: 2020-08-08 17:49:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4d6d0f1c1937f42d98fd0dd5926e87d1 SHA-1: 3261180b061a26be015c43ebd104eff5df0bad80 SHA-256: c92e8cf0c119ae9165bfd14e7791c4c292452ef274921918e13ee546aa67afd6
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to external resources. One critical heuristic identified a malicious redirector link, suggesting a phishing or malware distribution attempt. The document body, though heavily obfuscated, contains text related to a 'calendario escolar 2020 chile pdf' and the malicious redirector URL, indicating a lure to disguise the malicious intent. The file is likely used to redirect users to malicious content.

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=calendario+escolar+2020+chile+pdf
    • http://files.ricelandcrawfish.com/uploads/1/3/2/7/132712369/7199067.pdf
    • http://toxabufuf.thenetworkhe.com/uploads/1/3/0/7/130739777/5140790.pdf
    • http://files.mscommunicationassociation.com/uploads/1/3/0/7/130738970/wojuse.pdf
    • http://bijejo.friendsofskihi.org/uploads/1/3/1/8/131856772/fefebefetix-nigiditaku-lusor.pdf
    • https://cdn.shopify.com/s/files/1/0431/4539/6386/files/72041681593.pdf
    • https://cdn.shopify.com/s/files/1/0431/2127/9137/files/lutaja.pdf
    • https://cdn.shopify.com/s/files/1/0447/8651/6134/files/linear_algebra_2_lecture_notes.pdf
    • https://cdn.shopify.com/s/files/1/0432/4907/4336/files/zulububizaneruvuf.pdf
    • https://cdn.shopify.com/s/files/1/0430/4227/5485/files/3994392769.pdf
    • https://cdn.shopify.com/s/files/1/0435/9775/8622/files/monk_unearthed_arcana.pdf
    • https://cdn.shopify.com/s/files/1/0440/6339/1894/files/90744139938.pdf
    • https://cdn.shopify.com/s/files/1/0433/2371/9845/files/pusuwoxuxerurawesekuvo.pdf
    • https://cdn.shopify.com/s/files/1/0437/0300/9430/files/43175986264.pdf
    • https://cdn.shopify.com/s/files/1/0431/4379/0760/files/gavidetevo.pdf
    • https://cdn.shopify.com/s/files/1/0432/5670/9288/files/wilopegoxevasiri.pdf
    • https://cdn.shopify.com/s/files/1/0432/6214/8763/files/dogota.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_off00005eeb.bin
1ce6af50c859cccdad0d07a99375c4fb95eda5313227dac1a8d5676f9a28d78d
pdf-font-stream PDF embedded font (sfnt) at offset 0x5EEB 5424 bytes
font_01_sfnt_off00007147.bin
7bb91423d63eb6bd7c2657278979848d60b7d38679106ec23dbd755ba6ab3d32
pdf-font-stream PDF embedded font (sfnt) at offset 0x7147 2320 bytes
font_02_sfnt_off00007b97.bin
dc55444df5f08e0ac267b7aa7a174994239b8b1a021f40966d96667a1be97b71
pdf-font-stream PDF embedded font (sfnt) at offset 0x7B97 11384 bytes