Malicious PDF — malware analysis report

Static analysis result for SHA-256 05c1527105dd37bd…

MALICIOUS

PDF

40.7 KB Created: 2020-08-21 21:40:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7e01a6a304ce2420b92e6ca8147c88f8 SHA-1: b14368a2b7a745c926588f9f465d880650511951 SHA-256: 05c1527105dd37bd4eb386f96b5f81283be984923150a8bdf5a3356c14507964
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple embedded links, with one pointing to a known malicious redirector. The document body, though heavily obfuscated, also contains the same malicious URL. The presence of a link farm suggests an attempt to manipulate search engine results or distribute malicious content broadly. No scripts were extracted, limiting the analysis of direct execution capabilities.

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.com/pify?keyword=2mm+acrylic+glazing+sheet
    • http://jumez.seafom-friendsofmontessori.org/uploads/1/3/2/7/132712572/sakumubumomuwod.pdf
    • http://xifuri.marinashacola.com/uploads/1/3/1/6/131637223/124bf3934.pdf
    • http://tizutozaz.thiruvizha.ca/uploads/1/3/2/6/132682883/a5cd37.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/0058/6649/files/36087938167.pdf
    • https://cdn.shopify.com/s/files/1/0459/9906/3199/files/daru_badnaam_karti_mp4_video_song.pdf
    • https://cdn.shopify.com/s/files/1/0433/5131/0488/files/fedodawudigisidafimok.pdf
    • https://cdn.shopify.com/s/files/1/0450/9430/5957/files/56968594742.pdf
    • https://cdn.shopify.com/s/files/1/0432/4923/8184/files/90468627603.pdf
    • https://cdn.shopify.com/s/files/1/0434/4948/3426/files/68429033608.pdf
    • https://cdn.shopify.com/s/files/1/0433/7978/5886/files/kobuwomovub.pdf
    • https://cdn.shopify.com/s/files/1/0433/7811/4727/files/36039298254.pdf
    • https://cdn.shopify.com/s/files/1/0434/2113/9096/files/apa_guidelines_for_footnotes.pdf
    • https://cdn.shopify.com/s/files/1/0434/1992/6679/files/basic_conversation_questions_in_english.pdf
    • https://cdn.shopify.com/s/files/1/0438/6321/2192/files/40999089113.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_off000060ae.bin
f5019283fe58699168988dfe6b64d4ab0cc8c0c7f04647864011b2a454f82d2b
pdf-font-stream PDF embedded font (sfnt) at offset 0x60AE 5404 bytes
font_01_sfnt_off000072e7.bin
a5b11dd7f51c610720d9aee5f7086a03e69d952d52c1ac785cbb6d3cbf433d3f
pdf-font-stream PDF embedded font (sfnt) at offset 0x72E7 10408 bytes