Malicious PDF — malware analysis report

Static analysis result for SHA-256 5016a2e0d9cfb433…

MALICIOUS

PDF

45.9 KB Created: 2020-08-12 10:25:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6df6d5cc9f1e8bc491d56aad9a6ac3bd SHA-1: 04fd15733a5c0df83b67a8fd6933251b1b446bd1 SHA-256: 5016a2e0d9cfb433def0bf93e9fc8d6a3dda6b101c0630c3b7fc97697a6861f7
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 PDF files hosted on various domains. One critical heuristic firing indicates that the PDF links to known malicious redirector infrastructure, specifically 'https://ttraff.ru/pify?keyword=baciloscopia+seriada+pdf'. This suggests a link farm or redirection scheme designed to lead users to malicious content. No scripts were extracted from this sample.

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=baciloscopia+seriada+pdf
    • http://doxok.nonviolentcarbondale.org/uploads/1/3/1/4/131437601/fixolonobuvome_tukifatu_dubax.pdf
    • http://lejuroniv.maryscomix.com/uploads/1/3/0/8/130814328/8724854.pdf
    • http://files.robertssurf.com/uploads/1/3/0/9/130969944/modug_fogotupixe_tinemolukem_fetuder.pdf
    • https://cdn.shopify.com/s/files/1/0431/5817/5906/files/lotalu.pdf
    • https://cdn.shopify.com/s/files/1/0430/7949/9940/files/puxanisim.pdf
    • https://cdn.shopify.com/s/files/1/0433/6189/4565/files/thematic_apperception_test_tat_part_1_ebook_100_stories.pdf
    • https://cdn.shopify.com/s/files/1/0433/9433/4869/files/field_guide_to_edible_wild_plants.pdf
    • https://cdn.shopify.com/s/files/1/0428/9249/2963/files/tuzogedibubafejemobi.pdf
    • https://cdn.shopify.com/s/files/1/0429/5199/9637/files/6531083310.pdf
    • https://cdn.shopify.com/s/files/1/0427/8062/3015/files/jarogakovev.pdf
    • https://cdn.shopify.com/s/files/1/0433/8342/3128/files/93228771178.pdf
    • https://cdn.shopify.com/s/files/1/0431/8475/0747/files/artificial_neural_network_using_python.pdf
    • https://cdn.shopify.com/s/files/1/0431/6574/5303/files/38680666980.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_off0000749b.bin
42802c59de113c8bb916abe929eb15b2d4c0a798dd3779c743caf85705f30223		 pdf-font-stream PDF embedded font (sfnt) at offset 0x749B 5200 bytes
font_01_sfnt_off00008651.bin
7a378444c23904909d710a203130eb5f6013bbe80e3fd0d552189893f9700124		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8651 10876 bytes

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