Malicious PDF — malware analysis report

Static analysis result for SHA-256 674e76d0855beabf…

MALICIOUS

PDF

46.0 KB Created: 2020-09-03 00:06:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ec641a2e0c8afb2c6c3cf0ae5f18b08c SHA-1: 3fa6c8e428b33cedf061cec91199e28caa6c0d39 SHA-256: 674e76d0855beabf5f85732d9e30963d0247f0242149eb2ceadb1962eda987f2
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a link disguised as educational material that redirects to a malicious URL, likely for phishing or malware distribution. The ML classifier strongly indicated maliciousness, and the PDF structure includes a link farm pointing to various external resources. No scripts were extracted, but the embedded URL and link farm heuristics suggest a social engineering attack.

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/wix?keyword=comprehensive+chemistry+book+class+11+pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/6779/3820/files/bohr_atomic_model_postulates.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/botudurodakokebavexosox.pdf
    • https://cdn.shopify.com/s/files/1/0433/6720/2974/files/gejabepixikafikoloriga.pdf
    • https://cdn.shopify.com/s/files/1/0438/3208/2594/files/gepolukurutaxafozatidorid.pdf
    • https://static.usrfiles.com/ugd/b8c837_9b7fd98a56984821900bff5466b75b4a.pdf
    • https://static.usrfiles.com/ugd/5bb01c_5766a4f0e1e54944b8da514533ec233d.pdf
    • https://static.usrfiles.com/ugd/1849a1_f352fe7ba2214611b0d96a588b18686b.pdf
    • https://static.usrfiles.com/ugd/0c60a0_db3fc4f52ab34d718b51a80baf54f6fb.pdf
    • https://static.usrfiles.com/ugd/de60da_ebc0db2835d34c2bb05b7551539e0483.pdf
    • https://static.usrfiles.com/ugd/4bdc6d_ab60744a69264091aeacb4a79df139bc.pdf
    • https://static.usrfiles.com/ugd/e2b09b_36d059a57f4940f580251f648b64b582.pdf
    • https://static.usrfiles.com/ugd/f14cf6_97985c065754415da90a0a30b1bdbf94.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005f21.bin
bc628312fbe6bb7aca859bf57de3c5f003dbba8f5ebd59dafce009a635666dc9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F21 5720 bytes
font_01_sfnt_off00007273.bin
10690558962429e56dd08fdbb97e0b90b22ef018cb1652c8dc66d2ed22ba52ca		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7273 10420 bytes
font_02_sfnt_off00009609.bin
ead7fd593d7f5feef6f283420e9b55f8fa4552f107c64b0063d474dd3355abd8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9609 16164 bytes

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