Malicious PDF — malware analysis report

Static analysis result for SHA-256 c14a139aebc065c5…

MALICIOUS

PDF

39.3 KB Created: 2020-07-09 22:57:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-25
MD5: 352560b6fc124b316e23a4f3d627f223 SHA-1: 985e5258a1451fb547a40f89d87ba9bfb401c931 SHA-256: c14a139aebc065c51abb581a9c31195e79968ca71aca4b4ee743476f1a4ec2b0
184 Risk Score

Malware Insights

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

The PDF document contains a lure related to 'ilovepdf convert pdf to excel' and embeds a large number of external links, many of which point to disposable hosting. One critical heuristic identified a link to known malicious redirector infrastructure at https://ttraff.ru/wb?keyword=ilovepdf%20convert%20pdf%20to%20excel. The document body itself is heavily obfuscated but contains references to the same lure and numerous URLs, suggesting a link farm designed to redirect users to malicious sites. No scripts were extracted from this sample.

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.ru/wb?keyword=ilovepdf%20convert%20pdf%20to%20excel In PDF document text
    • http://files.acnaturalhistorymuseum.org/uploads/1/3/1/4/131453241/fepumetokuzerunavedi.pdfIn PDF document text
    • http://files.topsail-charters.com/uploads/1/3/2/7/132740545/kujol.pdfIn PDF document text
    • http://files.aarontmoore.com/uploads/1/3/1/0/131070992/447be.pdfIn PDF document text
    • http://files.barrvillemc.org/uploads/1/3/0/7/130776118/423244.pdfIn PDF document text
    • http://files.lascolinaspsych.com/uploads/1/3/0/7/130739809/lofojezirex.pdfIn PDF document text
    • http://files.kallenakucers.com/uploads/1/3/1/3/131398252/121792.pdfIn PDF document text
    • http://files.themusicalcamera.com/uploads/1/3/2/3/132303020/foligafen-kadozogoxoj.pdfIn PDF document text
    • http://files.guerasboutique.com/uploads/1/3/1/6/131636972/vuroluzelax.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://puvudoxewe.files.wordpress.com/2020/07/baxepojugaruror.pdfIn PDF document text
    • https://rejifoni416819637.files.wordpress.com/2020/07/21353317493.pdfIn PDF document text
    • https://rafuzakaxoru.files.wordpress.com/2020/06/3464223024.pdfIn PDF document text
    • https://kupasexale.files.wordpress.com/2020/07/pamewigugopugip.pdfIn PDF document text
    • https://kisefavel526658237.files.wordpress.com/2020/06/76233523709.pdfIn PDF document text
    • https://fonepepulex.files.wordpress.com/2020/06/32267283703.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/jezimix.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/sarexomerowomowubufo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/wefudebavisizaku.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/rejupabofutub.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/nitopufekuriwuk.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005b08.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5B08 4564 bytes
SHA-256: 14a83ec9beac84ae7cc90c071fcfaf768104f22f0e7f00a6a17a33c01f0b9bb5
font_01_sfnt_off00006a99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A99 11724 bytes
SHA-256: 70c7a069528080c4786c5cb05909ebf9a89ccec181011bd2a8a71561da8c4bcb

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