Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d708ad443fb7651…

MALICIOUS

PDF

42.5 KB Created: 2020-08-04 20:55:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 69e08c67a9c996ce0b49cbca6774bbfa SHA-1: 0fa2cb863fc5c44e3ccda3baeabe7d307d0a25ed SHA-256: 0d708ad443fb76511ec9db6668e188f30128dde9d43bae05ec54c116bfbc91b6
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many of which point to Shopify domains hosting other PDFs, suggesting a link farm. One of the primary links, https://ttraff.com/pify?keyword=avodah+zarah+pdf, is identified as a malicious redirector. This indicates an attempt to lure users to malicious infrastructure, likely for further exploitation or phishing.

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.com/pify?keyword=avodah+zarah+pdf
    • http://files.thebeprojectllc.com/uploads/1/3/1/3/131398555/d745db6.pdf
    • http://guluxelan.wildharehome.com/uploads/1/3/1/4/131436978/4df9212.pdf
    • http://files.esulix.com/uploads/1/3/0/7/130776268/lebuvelejevu.pdf
    • http://reman.stanford-il.org/uploads/1/3/2/6/132681670/dafogevorasofular.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/0127/3758/files/wezuduriwidekijusunarevo.pdf
    • https://cdn.shopify.com/s/files/1/0432/7918/8118/files/jarudisu.pdf
    • https://cdn.shopify.com/s/files/1/0433/5442/3464/files/56104749121.pdf
    • https://cdn.shopify.com/s/files/1/0435/8370/1151/files/94501830999.pdf
    • https://cdn.shopify.com/s/files/1/0431/9445/0078/files/titilizinijigovo.pdf
    • https://cdn.shopify.com/s/files/1/0429/6802/3194/files/89535557759.pdf
    • https://cdn.shopify.com/s/files/1/0431/4071/0566/files/70801222133.pdf
    • https://cdn.shopify.com/s/files/1/0437/4393/6673/files/install_selenium_python.pdf
    • https://cdn.shopify.com/s/files/1/0428/5274/5375/files/fifofaruxuviwilop.pdf
    • https://cdn.shopify.com/s/files/1/0432/5376/0162/files/nozaw.pdf
    • https://cdn.shopify.com/s/files/1/0433/9885/6867/files/juwixefokeleboxazeberi.pdf
    • https://cdn.shopify.com/s/files/1/0437/0356/6486/files/26630076167.pdf
    • https://cdn.shopify.com/s/files/1/0438/4777/8469/files/birubisabi.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000067f0.bin
25470ffaf22a5403eff08cca6422a038ca7d6aa96258f0d0ff250f74892ae17a
pdf-font-stream PDF embedded font (sfnt) at offset 0x67F0 5020 bytes
font_01_sfnt_off0000790f.bin
e5888726dce16b9aca06cc464b5b2e0f7c1778a86de26cfe59187e7dd676f628
pdf-font-stream PDF embedded font (sfnt) at offset 0x790F 10472 bytes