Malicious PDF — malware analysis report

Static analysis result for SHA-256 03df8e041fb1a85e…

MALICIOUS

PDF

53.2 KB Created: 2020-10-04 02:40:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: b72b11d65b44c1f4a5387fd429d6508a SHA-1: 268f31bbce14a1035f631024746bde3df6157b7a SHA-256: 03df8e041fb1a85e5287c69a53bcce634ec2f42b0a399b10f21ae03a40593d52
124 Risk Score

Malware Insights

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

The PDF document contains multiple embedded URLs, with a critical heuristic firing for a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains references to the malicious URL and other links hosted on disposable domains. This suggests the primary purpose is to redirect users to malicious sites, likely for phishing or malware distribution.

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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://gettraff.ru/strik?keyword=acca+f3+book+pdf In PDF document text
    • https://site-1036711.mozfiles.com/files/1036711/woxopun.pdfIn PDF document text
    • https://site-1039757.mozfiles.com/files/1039757/wetojapoziki.pdfIn PDF document text
    • https://site-1040424.mozfiles.com/files/1040424/palokisopavofene.pdfIn PDF document text
    • https://site-1036702.mozfiles.com/files/1036702/sonugovekawunek.pdfIn PDF document text
    • https://site-1038738.mozfiles.com/files/1038738/36294081349.pdfIn PDF document text
    • http://files.mountedup.com/uploads/1/3/1/6/131637255/f15ee.pdfIn PDF document text
    • http://sukunaj.ambassadormoris.com/uploads/1/3/0/7/130776674/fac0bc526b9.pdfIn PDF document text
    • http://files.dukeladyblue.com/uploads/1/3/0/7/130775131/zisexiloterewej-pizuw-meganos-luvularo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/7498/4863/files/to_follow_a_line_by_merlie_alunan.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0485/8200/0800/files/tazofolofefazuvu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/6537/9489/files/atomic_number_and_atomic_mass_worksheet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0485/2147/8299/files/fast_acting_lime_walmart.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/4427/6904/files/mil_dot_vs_moa_adjustments.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/2652/9435/files/49278013987.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005a48.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5A48 6744 bytes
SHA-256: b29f9350a720d2da9dc50567d08c4a82684db1fcb28a47e3a5788345b392d808
font_01_sfnt_off00006b2d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6B2D 5200 bytes
SHA-256: d560cb786e144c367e0117e994513ff4be6c49db9415e23503bcd476c23e8762
font_02_sfnt_off00007cf6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7CF6 3512 bytes
SHA-256: 8f6b26b110629cf70187c3b6d4f2b8eb70b200514420927f4b23a8a0d72ae179
font_03_sfnt_off00008b13.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B13 10812 bytes
SHA-256: 6b4a2a1fec6da7a40e94cec306a8bd0e3bf61dd669cc3f3cbfb45ce569653183
font_04_sfnt_off0000aff9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAFF9 16880 bytes
SHA-256: 75e61907e23bda8d2075c611a55968a3b38f58831542b5fc93e3a3e73fc841f3

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