Malicious PDF — malware analysis report

Static analysis result for SHA-256 65dbfd428261c3a9…

MALICIOUS

PDF

42.4 KB Created: 2020-08-09 01:19:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b803f284264fa4bcb1bdeed4ca1eb52e SHA-1: cd9c5312bd94a942a2be39b55a382e54bb89dee5 SHA-256: 65dbfd428261c3a9432233cce519ea13c26e3ee9128722d85a973c5254a9905c
154 Risk Score

Malware Insights

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

The PDF contains numerous links, with one specifically pointing to a known malicious redirector. This suggests the document is part of a link farm or phishing campaign designed to lead users to malicious sites. The ML classifier also strongly indicated maliciousness.

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.cc/pify?keyword=statistical+methods+for+the+social+sciences+global+edition+pdf
    • http://files.happytailsdaycare.com/uploads/1/3/1/1/131163897/jidigike-jizokali.pdf
    • http://files.sewtruestudio.com/uploads/1/3/1/3/131398401/a32d0784860686.pdf
    • http://files.capoeiranottingham.co.uk/uploads/1/3/1/8/131871692/luzamapel.pdf
    • http://files.amigofields.com/uploads/1/3/2/8/132814990/64a9bb6ee5.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/0486/2375/files/84625790214.pdf
    • https://cdn.shopify.com/s/files/1/0434/3005/2007/files/national_awards_2020_download.pdf
    • https://cdn.shopify.com/s/files/1/0440/9769/9992/files/binary_search_recursive.pdf
    • https://cdn.shopify.com/s/files/1/0428/4802/6780/files/tenolovekibapefiduxedagu.pdf
    • https://cdn.shopify.com/s/files/1/0438/9873/2696/files/35986470845.pdf
    • https://cdn.shopify.com/s/files/1/0430/9244/3303/files/arte_bizantino_resumen.pdf
    • https://cdn.shopify.com/s/files/1/0433/2165/5464/files/architectural_styles_owen_hopkins.pdf
    • https://cdn.shopify.com/s/files/1/0438/4037/2896/files/al_arabiyyah_bayna_yadayk_download_free.pdf
    • https://cdn.shopify.com/s/files/1/0430/6495/0945/files/rifuniwavobakefenir.pdf
    • https://cdn.shopify.com/s/files/1/0433/9495/7466/files/21964621570.pdf
    • https://cdn.shopify.com/s/files/1/0431/4310/2613/files/gray_code_to_binary.pdf
    • https://cdn.shopify.com/s/files/1/0435/2586/5636/files/38933199284.pdf
    • https://cdn.shopify.com/s/files/1/0432/5349/8014/files/31487612522.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_off00006600.bin
abfea6bf73212e9cfef8b9bc588a123d16480ae9319b419ffea82206faeb9713		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6600 5812 bytes
font_01_sfnt_off0000799a.bin
d40f0bf3f7f53393bcc7990c1a91ff1b416197e769b707fcdd466adc91e2f1fc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x799A 9984 bytes

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