Malicious PDF — malware analysis report

Static analysis result for SHA-256 b0564f374aba7298…

MALICIOUS

PDF

38.2 KB Created: 2020-08-19 13:52:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b28013365dc956d4659c2af98d1fc69d SHA-1: 7513b0b712211844c1d2d4e4a1b588dfef3d99b4 SHA-256: b0564f374aba7298e11845589e846550f0096c81feb38b0267b8a07c01f72083
150 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, pointing to 'https://ttraff.com/pify?keyword=earth+making+of+a+planet+worksheet+answers'. This URL is likely used to redirect the user to a malicious site. The document also contains a PDF link farm heuristic, indicating a large number of external links, many of which are hosted on Shopify. The ML classifier strongly flagged this PDF as malicious. No scripts were extracted, but the presence of a malicious redirector suggests a phishing or credential harvesting attempt.

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=earth+making+of+a+planet+worksheet+answers
    • http://siweb.carolmeadsart.com/uploads/1/3/1/4/131453960/40bac6d1884291b.pdf
    • http://files.fuelfitnessbootcamp.com/uploads/1/3/0/7/130776255/boriloxol.pdf
    • http://files.pallavisastry.com/uploads/1/3/1/4/131437683/bewinetit_kirefikij_nuvanitalikog_lagagux.pdf
    • https://cdn.shopify.com/s/files/1/0429/6661/4175/files/creo_parametric_3._0_tutorial.pdf
    • https://cdn.shopify.com/s/files/1/0429/0324/0871/files/kudajafu.pdf
    • https://cdn.shopify.com/s/files/1/0432/1129/2827/files/fiwebogejobubifetugetebix.pdf
    • https://cdn.shopify.com/s/files/1/0431/6859/6123/files/gubimujotupudivubenowa.pdf
    • https://cdn.shopify.com/s/files/1/0431/5847/0810/files/murexelazarefa.pdf
    • https://cdn.shopify.com/s/files/1/0430/8729/8714/files/finijuza.pdf
    • https://cdn.shopify.com/s/files/1/0434/6966/8517/files/96398540835.pdf
    • https://cdn.shopify.com/s/files/1/0434/1376/6293/files/serupisosukusibokebuv.pdf
    • https://cdn.shopify.com/s/files/1/0437/9839/7085/files/35055584754.pdf
    • https://cdn.shopify.com/s/files/1/0434/4014/4534/files/29469155538.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_off000057c2.bin
fded7eab829edb57b4ccb7f64421c3f7812d4af5b6fa60e7008b8de63da04496		 pdf-font-stream PDF embedded font (sfnt) at offset 0x57C2 5428 bytes
font_01_sfnt_off00006a2d.bin
044d09dbc1c10615fee5818581969f50836536ab12d62dbdd68b99517c768d4a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A2D 9884 bytes

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