Malicious PDF — malware analysis report

Static analysis result for SHA-256 9575ecfe3330ddf1…

MALICIOUS

PDF

56.1 KB Created: 2020-10-25 03:56:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 4b3fbd9b38b1d86544a93fceff80d26e SHA-1: 989403418d2e0655a4d542cc17cf95e359bf6cca SHA-256: 9575ecfe3330ddf1c4be10f653ed8f7ca9f1ea1c589018ead297f84f22d5b95d
154 Risk Score

Malware Insights

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

The PDF contains a link to a redirector URL, which is flagged as malicious. The document body, though heavily obfuscated, contains the same URL, suggesting it's the primary lure. The presence of numerous external PDF links, many pointing to Shopify, indicates a link farm strategy, likely to improve SEO for malicious content or to obscure the true destination.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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.me/pify?keyword=invisible+man+novel+character+sketch+pdf In PDF document text
    • https://medizagokitoni.weebly.com/uploads/1/3/2/3/132303310/wubevawuvogajopif.pdfIn PDF document text
    • https://dirigesibujov.weebly.com/uploads/1/3/0/9/130969991/101086.pdfIn PDF document text
    • https://dojulukasinu.weebly.com/uploads/1/3/0/7/130776790/3252221.pdfIn PDF document text
    • https://risimapi.weebly.com/uploads/1/3/4/3/134321435/jasevabexuniw-nefawofujul-pirem-xolagitixakakel.pdfIn PDF document text
    • https://xedaliwim.weebly.com/uploads/1/3/1/4/131454603/4003e9d095679.pdfIn PDF document text
    • https://rogidalot.weebly.com/uploads/1/3/1/6/131636841/228174.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/1/0501/7639/3368/files/sagamepagotakomunizo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/7762/6784/files/led_projector_lcd_image_system_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0504/8044/7653/files/2-5_practice_rational_functions_worksheet_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/0869/4171/files/21164870206.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7378/1408/files/23554367121.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ba29649f-dbf0-402d-b6d5-4aaad6c47d8f/wujipivopifiveremaneze.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ba491b41-ea6a-4893-be8a-ee80f36eb380/37630991784.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/523c426e-0c64-4040-ba79-7cb72b60ba91/vamexidepujepewopepaw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/87b8d196-54aa-4299-b9cf-a0b58dd9cbf7/52122866034.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/5779/3192/files/plus_global_audition_trainees.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0487/9941/6485/files/63982335392.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0462/3876/1109/files/kubetegasetexa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0494/8970/7167/files/tourist_guide_bangkok_thailand.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0477/6198/1596/files/22877786044.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
    • 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_off00006f2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F2C 2952 bytes
SHA-256: cb9072f881c1fe0ad8900bbcc5a20a23fabb306412f64e001cac76c2a9509f2c
font_01_sfnt_off000079bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x79BB 5596 bytes
SHA-256: c00d010757245cacdd7eb538cd1010d98193afb695f2631f96df107ccb8a09dd
font_02_sfnt_off00008c8c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8C8C 1800 bytes
SHA-256: daad3f347a4f42f432ee9983e619a7c063e36761dba5934b469418034847e28e
font_03_sfnt_off0000951a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x951A 11200 bytes
SHA-256: 3d38aebdc75bedbd737cd33d6e4633ec39ffe184647e47f3f5e734ba66e6e845
font_04_sfnt_off0000bb77.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBB77 16312 bytes
SHA-256: aad9bc0f36eadc3314e08670b59090120051e308b357201f134af3d0b781b2b0