Malicious PDF — malware analysis report

Static analysis result for SHA-256 439828520cea87ce…

MALICIOUS

PDF

38.4 KB Created: 2020-07-11 04:21:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-09-24
MD5: 7ce41dbaf0fcbf6bc4f21ff4515cc624 SHA-1: 82b719dd14d5ec9347290161669e5333106bfd12 SHA-256: 439828520cea87ce229295b70ca06dba006cb22826b0eacfd7c81a0af267672a
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of embedded links, many of which point to redirector infrastructure like https://ttraff.com/pify?keyword=pop+design+booklet+pdf. These links are designed to obscure the final destination, which is likely malicious. The document body, though heavily obfuscated, also contains URLs that appear to be part of a link farm, further supporting the malicious redirector hypothesis.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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=pop+design+booklet+pdf In PDF document text
    • http://files.maryamkdesignsai.com/uploads/1/3/0/8/130813923/kuguf_rewujasupobuzam_vopowivi_loxuk.pdfIn PDF document text
    • http://files.hsc3knives.com/uploads/1/3/0/9/130969243/a00465f049b.pdfIn PDF document text
    • http://files.breiterplanet.com/uploads/1/3/1/4/131437648/27872d6dc3e.pdfIn PDF document text
    • http://files.companionsofchrist.org/uploads/1/3/0/9/130969375/3234800.pdfIn PDF document text
    • http://files.chefleslieann.com/uploads/1/3/1/3/131379039/vuxijeb.pdfIn PDF document text
    • http://files.hideshackman.com/uploads/1/3/1/4/131408068/tudatumoku.pdfIn PDF document text
    • http://files.ldowingslaw.com/uploads/1/3/0/7/130775982/zajedapepag.pdfIn PDF document text
    • http://files.limassolsportsmassage.com/uploads/1/3/0/8/130874129/laxuvovobopekidom.pdfIn PDF document text
    • http://files.advfit.com/uploads/1/3/0/7/130776370/1d26b300.pdfIn PDF document text
    • http://files.annpopepotter.com/uploads/1/3/1/3/131383733/724557.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://kibufolawof.files.wordpress.com/2020/06/werujarixa.pdfIn PDF document text
    • https://zodamutove.files.wordpress.com/2020/06/nonozunudavojaposeletu.pdfIn PDF document text
    • https://wapulegumun.files.wordpress.com/2020/07/76072185088.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5310/4790/files/nividox.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/dijupabexapuvasazanuripik.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/vibamiwa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/13170590630.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005ad7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5AD7 4896 bytes
SHA-256: 11ce71dec3cdde9205aaf9e672d57d6a41b468c65040790c9301f6c6d21706de
font_01_sfnt_off00006b8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6B8F 9696 bytes
SHA-256: 78d5b2587ccf03a88aceb0f9914ab8f2a4fc3edaaae7e07fc273b43c8d0a76ff

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