Malicious PDF — malware analysis report

Static analysis result for SHA-256 d18b756ae90cd693…

MALICIOUS

PDF

118.4 KB Created: 2020-08-06 16:15:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c5b88e34c17640f2c22ef27a8c2a6fa3 SHA-1: 49de50f6680d32087fe1bad72530e145e28d4c2f SHA-256: d18b756ae90cd6937e65f0a7c69b77ee7996078d8c1e09f5c3a563da6da7c2fd
152 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing indicating a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains the URL 'https://ttraff.cc/pify?keyword=antibiotics+microbiology+pdf', suggesting a lure to a malicious site. The presence of a large number of external PDF links also points to a link farm or redirection strategy.

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=antibiotics+microbiology+pdf
    • http://files.tylerleighnicholson.com/uploads/1/3/1/4/131453194/woluraxupejew_vevusufoxiv_gesatuvakav.pdf
    • http://files.nickfesette.net/uploads/1/3/1/6/131606330/bcaff59445.pdf
    • http://files.courtneykobata.com/uploads/1/3/1/3/131383621/kamopuf.pdf
    • https://cdn.shopify.com/s/files/1/0432/1892/7778/files/xisuretomaviwesofegilu.pdf
    • https://cdn.shopify.com/s/files/1/0435/8776/4387/files/82570361105.pdf
    • https://cdn.shopify.com/s/files/1/0432/2403/9592/files/mumokigazot.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/setixinojed.pdf
    • https://cdn.shopify.com/s/files/1/0429/0933/5715/files/45542038525.pdf
    • https://cdn.shopify.com/s/files/1/0431/9281/1669/files/fases_de_la_meiosis_1_y_2.pdf
    • https://cdn.shopify.com/s/files/1/0431/4185/7448/files/rakavirifivovabarolek.pdf
    • https://cdn.shopify.com/s/files/1/0430/9575/2864/files/8110933592.pdf
    • https://cdn.shopify.com/s/files/1/0439/1239/6968/files/24838793796.pdf
    • https://cdn.shopify.com/s/files/1/0428/0687/0183/files/publication_502_irs.pdf
    • https://cdn.shopify.com/s/files/1/0430/4112/8601/files/60328537615.pdf
    • https://cdn.shopify.com/s/files/1/0433/1631/4277/files/5578351520.pdf
    • https://cdn.shopify.com/s/files/1/0437/8417/5773/files/60787000238.pdf
    • https://cdn.shopify.com/s/files/1/0439/4477/1739/files/zalulujafesuxor.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001836c.bin
8c0b598eaba65ea9261beab9ff914aef8141a6ffed53b8fbf8bc5af6a8a0fd9e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1836C 5168 bytes
font_01_sfnt_off000194d6.bin
0bdf49ded9ef008c3e3d586930c5e6e24c7c5c97c4e0ba7a5cf3638838c808e4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x194D6 12556 bytes
font_02_sfnt_off0001bdde.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1BDDE 4324 bytes

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