Malicious PDF — malware analysis report

Static analysis result for SHA-256 593d3df9bb764110…

MALICIOUS

PDF

44.2 KB Created: 2020-08-15 00:42:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d3401dfd70226c7666be652fdd8597c1 SHA-1: eb3953155820d668c4378a8cc10b83b69f682117 SHA-256: 593d3df9bb764110602e2de5d8ba2edbbecd8a87cf157eab53217b319d94ab6f
152 Risk Score

Malware Insights

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

The PDF contains a link that redirects to known malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though partially corrupted, contains text suggesting a lure related to a 'Formal dress shirt guide'. The PDF also exhibits characteristics of a link farm, with numerous embedded URLs pointing to external PDF files, many hosted on shopify.com. The ML classifier strongly flagged this PDF as malicious.

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=formal+dress+shirt+guide
    • http://files.feideartha-hypno-practice.com/uploads/1/3/2/6/132682990/zifigom.pdf
    • http://wijone.crosswindscrossfit.com/uploads/1/3/1/4/131407068/fitarepi.pdf
    • https://cdn.shopify.com/s/files/1/0436/4615/6960/files/xirowubobaxuruxavin.pdf
    • https://cdn.shopify.com/s/files/1/0428/1666/7815/files/nenesesivaxatakatipa.pdf
    • https://cdn.shopify.com/s/files/1/0429/9682/6273/files/nevifujeworalomekunimo.pdf
    • https://cdn.shopify.com/s/files/1/0429/2670/2755/files/87806030199.pdf
    • https://cdn.shopify.com/s/files/1/0430/8310/4409/files/19471005257.pdf
    • https://cdn.shopify.com/s/files/1/0430/4768/2201/files/61026283220.pdf
    • https://cdn.shopify.com/s/files/1/0427/9356/6364/files/gabeb.pdf
    • https://cdn.shopify.com/s/files/1/0434/0393/5902/files/9417906541.pdf
    • https://cdn.shopify.com/s/files/1/0431/9723/5363/files/76369382967.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_off00007120.bin
25755b2645505f8dd97358c5ab253c4733196b8e3de980ed73578382dd189c07		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7120 5196 bytes
font_01_sfnt_off0000829e.bin
ca1735bdd7d43b53bf1c65b77a0d951ad59dad4a66242655c3c27c39d272135d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x829E 9984 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.