Malicious PDF — malware analysis report

Static analysis result for SHA-256 dffa3095d1c58cf4…

MALICIOUS

PDF

35.1 KB Created: 2020-08-14 16:09:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bb6bf87518bf525a4f209a1f5927de64 SHA-1: a160f162b4abb8cff9d3bf938d2e69869fdfd176 SHA-256: dffa3095d1c58cf4707ffacdf82b6b07f65d20f7d2e8f3a0a3ac144ad357c6f5
150 Risk Score

Malware Insights

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

The PDF file exhibits characteristics of a link farm, with numerous embedded URLs. One prominent URL, 'https://ttraff.com/pify?keyword=musicas+ballet+infantil', is identified as a malicious redirector. The majority of the links point to Shopify-hosted PDFs, suggesting an attempt to obscure the malicious infrastructure or leverage legitimate platforms for hosting. 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=musicas+ballet+infantil
    • http://zikome.thejazzyjewelzstudio.com/uploads/1/3/1/0/131070590/343263.pdf
    • http://files.pureinspirationinc.com/uploads/1/3/2/7/132710683/fasebi.pdf
    • http://xukoxipol.dancingmindfulness.com/uploads/1/3/1/4/131453674/6513684.pdf
    • https://cdn.shopify.com/s/files/1/0433/3414/0056/files/string_to_lpcwstr.pdf
    • https://cdn.shopify.com/s/files/1/0435/3340/2266/files/funny_dirty_riddles_clean_answers.pdf
    • https://cdn.shopify.com/s/files/1/0430/8058/1274/files/8681393927.pdf
    • https://cdn.shopify.com/s/files/1/0431/3848/2332/files/zero_two_osu_skin.pdf
    • https://cdn.shopify.com/s/files/1/0433/7077/4677/files/endocrine_system_in_english.pdf
    • https://cdn.shopify.com/s/files/1/0432/8800/2710/files/tavabadenup.pdf
    • https://cdn.shopify.com/s/files/1/0432/2131/9839/files/alter_ego_3_b1_cahier_d_activits_corrige.pdf
    • https://cdn.shopify.com/s/files/1/0428/0070/9791/files/lemojafo.pdf
    • https://cdn.shopify.com/s/files/1/0447/9241/4369/files/how_to_block_people_on_spotify.pdf
    • https://cdn.shopify.com/s/files/1/0435/9726/7112/files/emerson_tv_manual.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_off00004376.bin
f644e0357ae7cb714f725b93ddb9577739aace6250cd3649f1dc2451dcab638d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4376 4924 bytes
font_01_sfnt_off0000544f.bin
acbd11e23eb05684274bf5a6d51d1cc2777ef428c25beaedd20119169365b430		 pdf-font-stream PDF embedded font (sfnt) at offset 0x544F 13784 bytes

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