Malicious PDF — malware analysis report

Static analysis result for SHA-256 f3a588f0db6b6534…

MALICIOUS

PDF

68.4 KB Created: 2020-08-15 04:15:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f6b91b447f870ae6066511ae1190a212 SHA-1: 589be1913a74f6e5b64910969e2d546276203f01 SHA-256: f3a588f0db6b653467c4933d76c1d4c89355c95f1100f3acd687ec9646d1d326
152 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to Shopify domains, but one critical link directs to a known malicious redirector. The document body, though heavily obfuscated, contains text related to 'Attributes of leadership pdf' and the malicious URL, suggesting a lure to a phishing or malware distribution site. 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=attributes+of+leadership+pdf
    • http://lupalinot.lickingvalleypac.org/uploads/1/3/0/8/130814328/2982696.pdf
    • https://cdn.shopify.com/s/files/1/0430/6301/7629/files/17095825282.pdf
    • https://cdn.shopify.com/s/files/1/0429/8814/2743/files/noblesse_oblige_definition.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/vitalifurefafimeribedewo.pdf
    • https://cdn.shopify.com/s/files/1/0435/8216/1053/files/23009523609.pdf
    • https://cdn.shopify.com/s/files/1/0432/4343/8242/files/83045178167.pdf
    • https://cdn.shopify.com/s/files/1/0437/8561/7566/files/xenavurebolu.pdf
    • https://cdn.shopify.com/s/files/1/0434/2326/9014/files/dalezamebebegadobelose.pdf
    • https://cdn.shopify.com/s/files/1/0430/3516/4835/files/17143430835.pdf
    • https://cdn.shopify.com/s/files/1/0428/0349/5071/files/domovexijos.pdf
    • https://cdn.shopify.com/s/files/1/0432/3475/4728/files/ritifofe.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_off0000cedf.bin
8dbb76defa542c7d33ddf4406f08c68e950d04ee0a4fa2261f648e4368b2f541		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCEDF 5256 bytes
font_01_sfnt_off0000e0ae.bin
21ca864a4ecb10954a6af3225c6666745c43ecb9713c5373997a6c909c13615f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE0AE 11028 bytes

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