Malicious PDF — malware analysis report

Static analysis result for SHA-256 cfa00a7ffd502650…

MALICIOUS

PDF

35.3 KB Created: 2020-07-08 20:54:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-09-24
MD5: 74a08a5c87c430cf9a21a95f044444d6 SHA-1: 4836352c212fd833610d6b4dbbbfc0f65b4b1da4 SHA-256: cfa00a7ffd5026500e655d89451b861e82fb002eaf4a268ca81e797b6383ada2
184 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, masquerading as an owner's manual for a 2008 Corolla. These links point to a redirector and a large farm of other PDF files, likely intended to manipulate search engine rankings or distribute further malicious content. The primary lure is the '2008 corolla le owners manual' keyword, which is also present in the document body.

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/wb?keyword=2008%20corolla%20le%20owners%20manual In PDF document text
    • http://files.jovaunholmes.com/uploads/1/3/0/8/130873973/818c81.pdfIn PDF document text
    • http://files.williammonaguenativeart.com/uploads/1/3/0/7/130739747/vunidegote.pdfIn PDF document text
    • http://files.shahnawazalam.com/uploads/1/3/1/8/131871720/lejugimemesuzed.pdfIn PDF document text
    • http://files.suncoastsoul.com/uploads/1/3/1/3/131379612/baretanemomimu.pdfIn PDF document text
    • http://files.acupunctureworkswonders.com/uploads/1/3/0/7/130775853/kiwobomipomebabu.pdfIn PDF document text
    • http://files.rachelsvineyardtucson.org/uploads/1/3/1/3/131383664/0714680.pdfIn PDF document text
    • http://files.shizokukaratedo.com/uploads/1/3/1/4/131438234/lomif-joxaw-posegogekumo.pdfIn PDF document text
    • http://files.sallysweetland.com/uploads/1/3/1/4/131438249/e377953a8cde1ef.pdfIn PDF document text
    • http://files.johnsonvisionassociates.com/uploads/1/3/1/8/131872048/2422429.pdfIn PDF document text
    • http://files.openstudiocatskill.com/uploads/1/3/1/3/131380723/1557959.pdfIn PDF document text
    • http://files.oagirlsbasketball.com/uploads/1/3/1/3/131380158/biwotusomozuve-desuxenopi-wixisekuv-bosovafafo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://rusifewejuv.files.wordpress.com/2020/07/98924865834.pdfIn PDF document text
    • https://xoxefudisose.files.wordpress.com/2020/07/54812509438.pdfIn PDF document text
    • https://pazavapasen.files.wordpress.com/2020/06/farinazejivususi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/baludugosutagaxoreforodul.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/86399573169.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/telisupuf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/ropuxikasafomudixaxo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/65294746239.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/71061356311.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_off00004eac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4EAC 5164 bytes
SHA-256: dadede4620b26b8e237797b4b306e5da20e1301791c2181129d6c399c5f170b2
font_01_sfnt_off00006010.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6010 9440 bytes
SHA-256: 75db301723a21614850b452aa8e962cd887e52b579f84b8f97e9359418fb388f