Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e826edd9b4a0b95…

MALICIOUS

PDF

62.7 KB Created: 2020-08-21 22:00:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d65f9fa02ff1d35bbacbdcd08c15b033 SHA-1: 86af98059eedff2b132670fe0d9fa84bff26b7ab SHA-256: 2e826edd9b4a0b9516085e2de8b09c569d6ed8bf1362662eb707f6857111a531
152 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links, many pointing to domains associated with link farms and redirectors. The primary malicious URL identified is https://ttraff.cc/pify?keyword=bongo+animal+information, which is flagged as a malicious redirector. The ML classifier also strongly indicated maliciousness. The document body itself is heavily obfuscated and appears to contain junk data alongside the malicious URL.

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=bongo+animal+information
    • http://palep.olgaflamenco.com/uploads/1/3/1/4/131438759/pikulixanizip.pdf
    • http://jowelezo.centralcorridorheathencelebrations.com/uploads/1/3/2/7/132712615/bivodagow.pdf
    • http://zaral.ims-spi.com/uploads/1/3/2/6/132696056/2005150.pdf
    • http://lupeke.vidosphere.com/uploads/1/3/2/7/132712358/vofanufunefaga_sagadi_xapad_ranesulinafozo.pdf
    • https://cdn.shopify.com/s/files/1/0434/9906/1408/files/tigujiludiv.pdf
    • https://cdn.shopify.com/s/files/1/0432/0985/1048/files/vorapoleresikagoduvuwawu.pdf
    • https://cdn.shopify.com/s/files/1/0434/9945/4628/files/2534255470.pdf
    • https://cdn.shopify.com/s/files/1/0429/7703/4399/files/kivozezulubonoduwag.pdf
    • https://cdn.shopify.com/s/files/1/0432/1358/6596/files/megekamav.pdf
    • https://cdn.shopify.com/s/files/1/0429/3355/1260/files/jofefesatusarevekebitemen.pdf
    • https://cdn.shopify.com/s/files/1/0434/0455/8488/files/after_effects_keyboard_shortcuts.pdf
    • https://cdn.shopify.com/s/files/1/0430/0275/7281/files/mogixalibijugexubu.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/kemisavixazesunomezixe.pdf
    • https://cdn.shopify.com/s/files/1/0464/3124/0344/files/bhagavata_purana_in_kannada.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_off0000ba0d.bin
71e64fd6ae36ce5ae70c91002de4a16dc8e43ff500198d733fb215b2d32a352b
pdf-font-stream PDF embedded font (sfnt) at offset 0xBA0D 4960 bytes
font_01_sfnt_off0000cad9.bin
14778bbda19e1697e132efd2e2c46b5f1751643c079318323b9e76cfcf2d7390
pdf-font-stream PDF embedded font (sfnt) at offset 0xCAD9 10336 bytes