Malicious PDF — malware analysis report

Static analysis result for SHA-256 be7510ed9506ec4b…

MALICIOUS

PDF

44.0 KB Created: 2020-10-30 15:42:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: afc1a538391ab6e0df48b1bda89f44f6 SHA-1: 12bc361a1965e1a97b70b15e771fc0587d2ea012 SHA-256: be7510ed9506ec4b86b41facd352a6f718cfb70c6c8bfadc274e426379dd394a
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

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.me/pify?keyword=sun+joe+dethatcher+parts In PDF document text
    • https://menelaxewo.weebly.com/uploads/1/3/4/3/134362368/6747421.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/tujeviwakirawu/73935362260.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1275/8426/files/dominick_the_donkey_lyrics.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/1225/7952/files/gamafidasatawoxujezo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/6875/8453/files/doenas_ocupacionais_psicossociais.pdfIn PDF document text
    • https://s3.amazonaws.com/xovajukoxin/65140820349.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6425/2821/files/11130626536.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/7105/2703/files/19040401374.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4983/5930/files/6274164668.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000608b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x608B 5308 bytes
SHA-256: 6008bef7326bd5abbadade4adefd3e8e4a7249bbc724ac629999769ee3d10ee5
font_01_sfnt_off0000728d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x728D 2484 bytes
SHA-256: ab7fbbfdb5805f00ab1048cecf8f6f709e732e6799efea24856be4c8beceaf1b
font_02_sfnt_off00007d3a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7D3A 11456 bytes
SHA-256: f878ff15a83b7b765c0cdf076501355f965136b19edcc8f58693675e807bca3e