Malicious PDF — malware analysis report

Static analysis result for SHA-256 43e56a94d0f0e1ed…

MALICIOUS

PDF

33.6 KB Created: 2020-08-07 02:42:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 55d18a61637e4beec8e59fcdbf367fe3 SHA-1: c670b58c166de99fa1d2a903b86be414089f2eae SHA-256: 43e56a94d0f0e1ed057e043031f24a4fda685b01ca72efcd1103d9ee3882f4db
120 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, many of which point to external resources. One critical heuristic identified a link to known malicious redirector infrastructure at 'https://ttraff.ru/pify?keyword=cambridge+primary+science+skills+builder+4+pdf'. Another heuristic flagged the document as a link farm, suggesting an attempt to manipulate search engine results or distribute malicious links. The document body contains text related to 'Cambridge primary science skills builder 4 pdf', likely a lure to disguise the malicious intent.

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=cambridge+primary+science+skills+builder+4+pdf
    • http://files.riverwoodwinery.com/uploads/1/3/2/6/132695525/vadote-tiwibakoj-fusixowo-nofiwibevos.pdf
    • http://files.sacredlivingspiritualcenter.com/uploads/1/3/0/7/130739061/xewali.pdf
    • http://bobexejip.musiccitygoldendoodles.com/uploads/1/3/1/4/131453850/5017552.pdf
    • https://cdn.shopify.com/s/files/1/0438/5266/0901/files/resowukebunododabapos.pdf
    • https://cdn.shopify.com/s/files/1/0435/9825/0141/files/jebij.pdf
    • https://cdn.shopify.com/s/files/1/0433/9780/8279/files/gidolegu.pdf
    • https://cdn.shopify.com/s/files/1/0432/0568/9499/files/beyond_compare_to_text_not_found.pdf
    • https://cdn.shopify.com/s/files/1/0431/4175/9138/files/2610678122.pdf
    • https://cdn.shopify.com/s/files/1/0432/0657/4240/files/wumezolemukesekipu.pdf
    • https://cdn.shopify.com/s/files/1/0433/9014/0581/files/norm_cdf_vs.pdf
    • https://cdn.shopify.com/s/files/1/0440/9583/2216/files/anatomie_et_physiologie_du_pied.pdf
    • https://cdn.shopify.com/s/files/1/0430/5420/3031/files/trinomio_cuadrado_perfecto_ejemplos.pdf
    • https://cdn.shopify.com/s/files/1/0432/5307/2022/files/agnieszka_mielczarek_ksika.pdf
    • https://cdn.shopify.com/s/files/1/0430/4073/5381/files/vavuvuzositifusobim.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_off000044b5.bin
f226ce5c99f4113e19b8aa69e9487f74a6ae3ccadb411f7a786a2f8e03a26366		 pdf-font-stream PDF embedded font (sfnt) at offset 0x44B5 5772 bytes
font_01_sfnt_off00005851.bin
0bd04b782ec9ed983af44843093b0bd43d166f0d9dcf7508155850225a5c5644		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5851 9632 bytes

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