Malicious PDF — malware analysis report

Static analysis result for SHA-256 edfaf38dd30036f4…

MALICIOUS

PDF

44.1 KB Created: 2020-08-18 13:39:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cded8a462acce8879ac98311715f2640 SHA-1: d2e8440843ddfcdb320a5b016fb126d5b03ebfc3 SHA-256: edfaf38dd30036f48f3520264f0dd286ff9f0e0a1e0613ce80e0d804ecdaad85
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains embedded links that lead to a malicious redirector, disguised as an installation guide. The primary malicious URL is https://ttraff.cc/pify?keyword=dstv+explora+extra+view+installation+guide+pdf, which is designed to lure users into clicking through to potentially harmful content. The ML classifier strongly indicated maliciousness, and the presence of numerous external PDF links, many pointing to potentially compromised or malicious domains, further supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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=dstv+explora+extra+view+installation+guide+pdf
    • http://gakifa.spotlessga.com/uploads/1/3/0/7/130739592/fdfea8da81576.pdf
    • http://files.marcoschirripa.com/uploads/1/3/1/6/131606260/zatelavuvogejaf.pdf
    • http://domawefok.romforsenate.org/uploads/1/3/2/3/132303382/warit.pdf
    • http://files.camilleplatt.com/uploads/1/3/2/6/132696155/binosepedalodix_vekumarunil_norajimig_namajufewolip.pdf
    • https://cdn.shopify.com/s/files/1/0432/5657/8212/files/fadedoguxomere.pdf
    • https://cdn.shopify.com/s/files/1/0437/9289/2061/files/libro_breviario_de_los_politicos.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/67572949107.pdf
    • https://cdn.shopify.com/s/files/1/0452/0479/9639/files/communicating_in_business_english_bob_dignen_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0437/0441/8459/files/scratch_2._0_manual.pdf
    • https://cdn.shopify.com/s/files/1/0433/4590/3781/files/25189273498.pdf
    • https://cdn.shopify.com/s/files/1/0436/9629/1994/files/82326085616.pdf
    • https://cdn.shopify.com/s/files/1/0437/8558/4797/files/how_to_post_videos_on_discord.pdf
    • https://cdn.shopify.com/s/files/1/0432/0778/6654/files/wujejifuvesenubu.pdf
    • https://cdn.shopify.com/s/files/1/0434/1648/6040/files/bekenugaselo.pdf
    • https://cdn.shopify.com/s/files/1/0434/5567/6583/files/86190865369.pdf
    • https://cdn.shopify.com/s/files/1/0432/6529/4504/files/bangalore_road_map_free.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_off00006dab.bin
f45a735906f27e66d48e90e1963bcb550a8862d78c2326eea91bf2c091c24185		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6DAB 5428 bytes
font_01_sfnt_off00008054.bin
e8c22613cb949599a05acdbe2e4190e1e24eda12d43df714652ebbb1139bc6f1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8054 10220 bytes

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