Malicious PDF — malware analysis report

Static analysis result for SHA-256 da430792697c757e…

MALICIOUS

PDF

51.4 KB Created: 2020-09-08 01:47:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2be86fd2b22d27f6c34049156e4642cc SHA-1: 42e62bc87144b57eab0a55e9d2fdc87f1e3422ff SHA-256: da430792697c757e71b9cd50e2e05fc0d6ed3fba3aefbc3777a12ba8b11efa7a
154 Risk Score

Malware Insights

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

The PDF contains a link that redirects to malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body and embedded link text suggest a lure related to "Ssc admit card 2019 punjab", aiming to trick users into clicking the malicious URL. The PDF_SEO_LINK_FARM heuristic indicates a large number of outbound links, common in phishing or spam campaigns. No scripts were extracted from this sample.

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.club/wix?keyword=ssc+admit+card+2019++punjab
    • https://static.usrfiles.com/ugd/b8c837_426e891f1dd64b5bae7b05d0f50b8888.pdf
    • https://static.usrfiles.com/ugd/b7306e_6fe11627ae354df4a4048668146afa19.pdf
    • https://static.usrfiles.com/ugd/a2d007_21b4135fd4ab4436b433b582a3e2db66.pdf
    • https://cdn.shopify.com/s/files/1/0429/2499/8819/files/woxivuwozisotaxotumisot.pdf
    • https://cdn.shopify.com/s/files/1/0431/0849/9618/files/53916643427.pdf
    • https://cdn.shopify.com/s/files/1/0436/1755/0499/files/accounting_question_papers_grade_10.pdf
    • https://cdn.shopify.com/s/files/1/0435/9880/7202/files/microbiology_in_telugu.pdf
    • https://cdn.shopify.com/s/files/1/0432/5225/2829/files/ejercicios_de_enlaces_covalentes_resueltos.pdf
    • https://cdn.shopify.com/s/files/1/0430/0364/2007/files/naxaxomozos.pdf
    • https://static.usrfiles.com/ugd/374ce0_dc8aa3473d8148f0ac6b9c7681ab2dd6.pdf
    • https://static.usrfiles.com/ugd/b8c837_49f7236672a14310a7dd6c0d8eb3a75f.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/
    • https://static.usrfiles.com/ugd/a2d007_

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005eee.bin
6ae630b6eda2b57ece94ba70ed5a0f8d108cd785c512dbf0979fa1901a1c9bf1
pdf-font-stream PDF embedded font (sfnt) at offset 0x5EEE 5988 bytes
font_01_sfnt_off0000732d.bin
d0c9e33916e9e64e42e31bcf0d345f6c2fcd41735b1a34df0119bd0eb1094281
pdf-font-stream PDF embedded font (sfnt) at offset 0x732D 3720 bytes
font_02_sfnt_off00007e91.bin
253b45282b98faf0a1cc16f53189958b7820afb968941b716e51381925a3bbaf
pdf-font-stream PDF embedded font (sfnt) at offset 0x7E91 10088 bytes
font_03_sfnt_off0000a10d.bin
cef09cab505e33eea8b9b794c1815cac1ebb94be944d132d259030a2a21ab16d
pdf-font-stream PDF embedded font (sfnt) at offset 0xA10D 9412 bytes