Malicious PDF — malware analysis report

Static analysis result for SHA-256 a920b42e4431ea2d…

MALICIOUS

PDF

33.4 KB Created: 2020-07-31 21:55:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9e42d9b6e5b7fbb96af6936b4e07e548 SHA-1: 664dd740cc3912e3136626839b10d33cd861301a SHA-256: a920b42e4431ea2db720095868d84b8e288624e9273a02c2279e407413a8aa5e
150 Risk Score

Malware Insights

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

The PDF contains numerous embedded links designed to appear as legitimate SEO-optimized content, but ultimately redirect to a malicious URL. The primary malicious URL identified is https://ttraff.com/pify?keyword=drill+doctor+xpk, which is likely used to funnel victims to further malicious content. The presence of a large number of PDF links and the ML classifier firing strongly indicate malicious intent.

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=drill+doctor+xpk
    • http://files.wildthymecatering.co.uk/uploads/1/3/1/0/131070842/gixizogalaxobi.pdf
    • http://files.anchoredstudents.com/uploads/1/3/1/4/131409309/vovidotaweb_wagiz_jifunafozip_fubovul.pdf
    • http://files.worldofspanishllc.com/uploads/1/3/2/6/132681901/toxide.pdf
    • http://files.gcmarshall2018.com/uploads/1/3/1/1/131164046/pupan.pdf
    • http://files.americanbellydance.com/uploads/1/3/1/3/131379874/ff7468.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/52657742202.pdf
    • https://cdn.shopify.com/s/files/1/0434/4987/6630/files/27904495257.pdf
    • https://cdn.shopify.com/s/files/1/0431/8789/6480/files/rugezewusakibanuge.pdf
    • https://cdn.shopify.com/s/files/1/0431/0210/9856/files/46592622885.pdf
    • https://cdn.shopify.com/s/files/1/0429/5147/5351/files/27349057092.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/liwisubusamepumiv.pdf
    • https://cdn.shopify.com/s/files/1/0432/5185/9616/files/kilabopofopaka.pdf
    • https://cdn.shopify.com/s/files/1/0435/5306/3063/files/36535777950.pdf
    • https://cdn.shopify.com/s/files/1/0431/4071/0566/files/wenuto.pdf
    • https://cdn.shopify.com/s/files/1/0427/8904/4383/files/winesugamotisaxud.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_off0000469e.bin
d65d1e0e9f6c70d027c8db8427a2840fb1d3dbcb63931c8838c5052aa8852721		 pdf-font-stream PDF embedded font (sfnt) at offset 0x469E 4808 bytes
font_01_sfnt_off00005712.bin
70077537d9808732d107059a51237709deff2b78f0c995144cb7ea2a35e3dfc0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5712 9948 bytes

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