Malicious PDF — malware analysis report

Static analysis result for SHA-256 62b20ac3eeb60c74…

MALICIOUS

PDF

38.7 KB Created: 2020-08-19 11:50:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2307fd8be2f61bf8584694cab15c7728 SHA-1: 9459207e61dd26fb6786c8d83502e762df65c3ba SHA-256: 62b20ac3eeb60c7437df79e3ff3c90082e2caf8101419ace9d4c41465a97427a
154 Risk Score

Malware Insights

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

The PDF contains embedded URLs, with one identified as a malicious redirector. The document body, though partially corrupted, suggests a lure related to 'certification of health care provider fmla form'. The presence of numerous links, including a malicious redirector, indicates an attempt to direct users to potentially harmful content, likely for phishing or malware delivery. No scripts were extracted, but the PDF structure and embedded links are strong indicators of malicious intent.

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.ru/pify?keyword=certification+of+health+care+provider+fmla+form
    • http://files.peoplesmovementofpakistan.org/uploads/1/3/1/4/131438150/begarakuforema-mumugofixito-lemit.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/4275/8056/files/thank_you_animated_gif_images_free.pdf
    • https://cdn.shopify.com/s/files/1/0450/3722/4094/files/causes_of_world_war_1_essay.pdf
    • https://cdn.shopify.com/s/files/1/0431/6836/6760/files/33154361917.pdf
    • https://cdn.shopify.com/s/files/1/0430/1189/9551/files/wafunise.pdf
    • https://cdn.shopify.com/s/files/1/0440/0542/5310/files/xiaomi_mi_air_purifier_2s_manual.pdf
    • https://cdn.shopify.com/s/files/1/0438/6367/0939/files/achilles_tendonitis_handout.pdf
    • https://cdn.shopify.com/s/files/1/0436/6339/2921/files/69787978085.pdf
    • https://cdn.shopify.com/s/files/1/0427/9618/7815/files/sajake.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005d30.bin
6998a7f6657e323db876055c213877fe2b625f1913d40a9f89a1b5f3c92ee731
pdf-font-stream PDF embedded font (sfnt) at offset 0x5D30 5180 bytes
font_01_sfnt_off00006ea4.bin
9a2f0d8245284b644e51ac007a3ee30e3f7c3d2b59b6ead64cf6a2c3eb400828
pdf-font-stream PDF embedded font (sfnt) at offset 0x6EA4 9232 bytes